fs/ksmbd/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14
  15 #include "glob.h"
  16 #include "smb2pdu.h"
  17 #include "smbfsctl.h"
  18 #include "oplock.h"
  19 #include "smbacl.h"
  20
  21 #include "auth.h"
  22 #include "asn1.h"
  23 #include "connection.h"
  24 #include "transport_ipc.h"
  25 #include "transport_rdma.h"
  26 #include "vfs.h"
  27 #include "vfs_cache.h"
  28 #include "misc.h"
  29
  30 #include "server.h"
  31 #include "smb_common.h"
  32 #include "smbstatus.h"
  33 #include "ksmbd_work.h"
  34 #include "mgmt/user_config.h"
  35 #include "mgmt/share_config.h"
  36 #include "mgmt/tree_connect.h"
  37 #include "mgmt/user_session.h"
  38 #include "mgmt/ksmbd_ida.h"
  39 #include "ndr.h"
  40
  41 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  42 {
  43         if (work->next_smb2_rcv_hdr_off) {
  44                 *req = ksmbd_req_buf_next(work);
  45                 *rsp = ksmbd_resp_buf_next(work);
  46         } else {
  47                 *req = work->request_buf;
  48                 *rsp = work->response_buf;
  49         }
  50 }
  51
  52 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  53
  54 /**
  55  * check_session_id() - check for valid session id in smb header
  56  * @conn:       connection instance
  57  * @id:         session id from smb header
  58  *
  59  * Return:      1 if valid session id, otherwise 0
  60  */
  61 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  62 {
  63         struct ksmbd_session *sess;
  64
  65         if (id == 0 || id == -1)
  66                 return false;
  67
  68         sess = ksmbd_session_lookup_all(conn, id);
  69         if (sess)
  70                 return true;
  71         pr_err("Invalid user session id: %llu\n", id);
  72         return false;
  73 }
  74
  75 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  76 {
  77         struct channel *chann;
  78
  79         list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
  80                 if (chann->conn == conn)
  81                         return chann;
  82         }
  83
  84         return NULL;
  85 }
  86
  87 /**
  88  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  89  * @work:       smb work
  90  *
  91  * Return:      0 if there is a tree connection matched or these are
  92  *              skipable commands, otherwise error
  93  */
  94 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  95 {
  96         struct smb2_hdr *req_hdr = work->request_buf;
  97         int tree_id;
  98
  99         work->tcon = NULL;
 100         if (work->conn->ops->get_cmd_val(work) == SMB2_TREE_CONNECT_HE ||
 101             work->conn->ops->get_cmd_val(work) ==  SMB2_CANCEL_HE ||
 102             work->conn->ops->get_cmd_val(work) ==  SMB2_LOGOFF_HE) {
 103                 ksmbd_debug(SMB, "skip to check tree connect request\n");
 104                 return 0;
 105         }
 106
 107         if (xa_empty(&work->sess->tree_conns)) {
 108                 ksmbd_debug(SMB, "NO tree connected\n");
 109                 return -ENOENT;
 110         }
 111
 112         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 113         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 114         if (!work->tcon) {
 115                 pr_err("Invalid tid %d\n", tree_id);
 116                 return -EINVAL;
 117         }
 118
 119         return 1;
 120 }
 121
 122 /**
 123  * smb2_set_err_rsp() - set error response code on smb response
 124  * @work:       smb work containing response buffer
 125  */
 126 void smb2_set_err_rsp(struct ksmbd_work *work)
 127 {
 128         struct smb2_err_rsp *err_rsp;
 129
 130         if (work->next_smb2_rcv_hdr_off)
 131                 err_rsp = ksmbd_resp_buf_next(work);
 132         else
 133                 err_rsp = work->response_buf;
 134
 135         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 136                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 137                 err_rsp->ErrorContextCount = 0;
 138                 err_rsp->Reserved = 0;
 139                 err_rsp->ByteCount = 0;
 140                 err_rsp->ErrorData[0] = 0;
 141                 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
 142         }
 143 }
 144
 145 /**
 146  * is_smb2_neg_cmd() - is it smb2 negotiation command
 147  * @work:       smb work containing smb header
 148  *
 149  * Return:      true if smb2 negotiation command, otherwise false
 150  */
 151 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 152 {
 153         struct smb2_hdr *hdr = work->request_buf;
 154
 155         /* is it SMB2 header ? */
 156         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 157                 return false;
 158
 159         /* make sure it is request not response message */
 160         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 161                 return false;
 162
 163         if (hdr->Command != SMB2_NEGOTIATE)
 164                 return false;
 165
 166         return true;
 167 }
 168
 169 /**
 170  * is_smb2_rsp() - is it smb2 response
 171  * @work:       smb work containing smb response buffer
 172  *
 173  * Return:      true if smb2 response, otherwise false
 174  */
 175 bool is_smb2_rsp(struct ksmbd_work *work)
 176 {
 177         struct smb2_hdr *hdr = work->response_buf;
 178
 179         /* is it SMB2 header ? */
 180         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 181                 return false;
 182
 183         /* make sure it is response not request message */
 184         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 185                 return false;
 186
 187         return true;
 188 }
 189
 190 /**
 191  * get_smb2_cmd_val() - get smb command code from smb header
 192  * @work:       smb work containing smb request buffer
 193  *
 194  * Return:      smb2 request command value
 195  */
 196 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 197 {
 198         struct smb2_hdr *rcv_hdr;
 199
 200         if (work->next_smb2_rcv_hdr_off)
 201                 rcv_hdr = ksmbd_req_buf_next(work);
 202         else
 203                 rcv_hdr = work->request_buf;
 204         return le16_to_cpu(rcv_hdr->Command);
 205 }
 206
 207 /**
 208  * set_smb2_rsp_status() - set error response code on smb2 header
 209  * @work:       smb work containing response buffer
 210  * @err:        error response code
 211  */
 212 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 213 {
 214         struct smb2_hdr *rsp_hdr;
 215
 216         if (work->next_smb2_rcv_hdr_off)
 217                 rsp_hdr = ksmbd_resp_buf_next(work);
 218         else
 219                 rsp_hdr = work->response_buf;
 220         rsp_hdr->Status = err;
 221         smb2_set_err_rsp(work);
 222 }
 223
 224 /**
 225  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 226  * @work:       smb work containing smb request buffer
 227  *
 228  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 229  * dialect auto-negotiation.
 230  */
 231 int init_smb2_neg_rsp(struct ksmbd_work *work)
 232 {
 233         struct smb2_hdr *rsp_hdr;
 234         struct smb2_negotiate_rsp *rsp;
 235         struct ksmbd_conn *conn = work->conn;
 236
 237         if (conn->need_neg == false)
 238                 return -EINVAL;
 239         if (!(conn->dialect >= SMB20_PROT_ID &&
 240               conn->dialect <= SMB311_PROT_ID))
 241                 return -EINVAL;
 242
 243         rsp_hdr = work->response_buf;
 244
 245         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 246
 247         rsp_hdr->smb2_buf_length =
 248                 cpu_to_be32(smb2_hdr_size_no_buflen(conn->vals));
 249
 250         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 251         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 252         rsp_hdr->CreditRequest = cpu_to_le16(2);
 253         rsp_hdr->Command = SMB2_NEGOTIATE;
 254         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 255         rsp_hdr->NextCommand = 0;
 256         rsp_hdr->MessageId = 0;
 257         rsp_hdr->Id.SyncId.ProcessId = 0;
 258         rsp_hdr->Id.SyncId.TreeId = 0;
 259         rsp_hdr->SessionId = 0;
 260         memset(rsp_hdr->Signature, 0, 16);
 261
 262         rsp = work->response_buf;
 263
 264         WARN_ON(ksmbd_conn_good(work));
 265
 266         rsp->StructureSize = cpu_to_le16(65);
 267         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 268         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 269         /* Not setting conn guid rsp->ServerGUID, as it
 270          * not used by client for identifying connection
 271          */
 272         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 273         /* Default Max Message Size till SMB2.0, 64K*/
 274         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 275         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 276         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 277
 278         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 279         rsp->ServerStartTime = 0;
 280
 281         rsp->SecurityBufferOffset = cpu_to_le16(128);
 282         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 283         ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
 284                 sizeof(rsp->hdr.smb2_buf_length)) +
 285                 le16_to_cpu(rsp->SecurityBufferOffset));
 286         inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
 287                 sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
 288                 AUTH_GSS_LENGTH);
 289         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 290         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 291                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 292         conn->use_spnego = true;
 293
 294         ksmbd_conn_set_need_negotiate(work);
 295         return 0;
 296 }
 297
 298 static int smb2_consume_credit_charge(struct ksmbd_work *work,
 299                                       unsigned short credit_charge)
 300 {
 301         struct ksmbd_conn *conn = work->conn;
 302         unsigned int rsp_credits = 1;
 303
 304         if (!conn->total_credits)
 305                 return 0;
 306
 307         if (credit_charge > 0)
 308                 rsp_credits = credit_charge;
 309
 310         conn->total_credits -= rsp_credits;
 311         return rsp_credits;
 312 }
 313
 314 /**
 315  * smb2_set_rsp_credits() - set number of credits in response buffer
 316  * @work:       smb work containing smb response buffer
 317  */
 318 int smb2_set_rsp_credits(struct ksmbd_work *work)
 319 {
 320         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 321         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 322         struct ksmbd_conn *conn = work->conn;
 323         unsigned short credits_requested = le16_to_cpu(req_hdr->CreditRequest);
 324         unsigned short credit_charge = 1, credits_granted = 0;
 325         unsigned short aux_max, aux_credits, min_credits;
 326         int rsp_credit_charge;
 327
 328         if (hdr->Command == SMB2_CANCEL)
 329                 goto out;
 330
 331         /* get default minimum credits by shifting maximum credits by 4 */
 332         min_credits = conn->max_credits >> 4;
 333
 334         if (conn->total_credits >= conn->max_credits) {
 335                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 336                 conn->total_credits = min_credits;
 337         }
 338
 339         rsp_credit_charge =
 340                 smb2_consume_credit_charge(work, le16_to_cpu(req_hdr->CreditCharge));
 341         if (rsp_credit_charge < 0)
 342                 return -EINVAL;
 343
 344         hdr->CreditCharge = cpu_to_le16(rsp_credit_charge);
 345
 346         if (credits_requested > 0) {
 347                 aux_credits = credits_requested - 1;
 348                 aux_max = 32;
 349                 if (hdr->Command == SMB2_NEGOTIATE)
 350                         aux_max = 0;
 351                 aux_credits = (aux_credits < aux_max) ? aux_credits : aux_max;
 352                 credits_granted = aux_credits + credit_charge;
 353
 354                 /* if credits granted per client is getting bigger than default
 355                  * minimum credits then we should wrap it up within the limits.
 356                  */
 357                 if ((conn->total_credits + credits_granted) > min_credits)
 358                         credits_granted = min_credits - conn->total_credits;
 359                 /*
 360                  * TODO: Need to adjuct CreditRequest value according to
 361                  * current cpu load
 362                  */
 363         } else if (conn->total_credits == 0) {
 364                 credits_granted = 1;
 365         }
 366
 367         conn->total_credits += credits_granted;
 368         work->credits_granted += credits_granted;
 369
 370         if (!req_hdr->NextCommand) {
 371                 /* Update CreditRequest in last request */
 372                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 373         }
 374 out:
 375         ksmbd_debug(SMB,
 376                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 377                     credits_requested, credits_granted,
 378                     conn->total_credits);
 379         return 0;
 380 }
 381
 382 /**
 383  * init_chained_smb2_rsp() - initialize smb2 chained response
 384  * @work:       smb work containing smb response buffer
 385  */
 386 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 387 {
 388         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 389         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 390         struct smb2_hdr *rsp_hdr;
 391         struct smb2_hdr *rcv_hdr;
 392         int next_hdr_offset = 0;
 393         int len, new_len;
 394
 395         /* Len of this response = updated RFC len - offset of previous cmd
 396          * in the compound rsp
 397          */
 398
 399         /* Storing the current local FID which may be needed by subsequent
 400          * command in the compound request
 401          */
 402         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 403                 work->compound_fid =
 404                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 405                                 VolatileFileId);
 406                 work->compound_pfid =
 407                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 408                                 PersistentFileId);
 409                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 410         }
 411
 412         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 413         next_hdr_offset = le32_to_cpu(req->NextCommand);
 414
 415         new_len = ALIGN(len, 8);
 416         inc_rfc1001_len(work->response_buf, ((sizeof(struct smb2_hdr) - 4)
 417                         + new_len - len));
 418         rsp->NextCommand = cpu_to_le32(new_len);
 419
 420         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 421         work->next_smb2_rsp_hdr_off += new_len;
 422         ksmbd_debug(SMB,
 423                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 424                     new_len, work->next_smb2_rcv_hdr_off,
 425                     work->next_smb2_rsp_hdr_off);
 426
 427         rsp_hdr = ksmbd_resp_buf_next(work);
 428         rcv_hdr = ksmbd_req_buf_next(work);
 429
 430         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 431                 ksmbd_debug(SMB, "related flag should be set\n");
 432                 work->compound_fid = KSMBD_NO_FID;
 433                 work->compound_pfid = KSMBD_NO_FID;
 434         }
 435         memset((char *)rsp_hdr + 4, 0, sizeof(struct smb2_hdr) + 2);
 436         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 437         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 438         rsp_hdr->Command = rcv_hdr->Command;
 439
 440         /*
 441          * Message is response. We don't grant oplock yet.
 442          */
 443         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 444                                 SMB2_FLAGS_RELATED_OPERATIONS);
 445         rsp_hdr->NextCommand = 0;
 446         rsp_hdr->MessageId = rcv_hdr->MessageId;
 447         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 448         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 449         rsp_hdr->SessionId = rcv_hdr->SessionId;
 450         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 451 }
 452
 453 /**
 454  * is_chained_smb2_message() - check for chained command
 455  * @work:       smb work containing smb request buffer
 456  *
 457  * Return:      true if chained request, otherwise false
 458  */
 459 bool is_chained_smb2_message(struct ksmbd_work *work)
 460 {
 461         struct smb2_hdr *hdr = work->request_buf;
 462         unsigned int len, next_cmd;
 463
 464         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 465                 return false;
 466
 467         hdr = ksmbd_req_buf_next(work);
 468         next_cmd = le32_to_cpu(hdr->NextCommand);
 469         if (next_cmd > 0) {
 470                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 471                         __SMB2_HEADER_STRUCTURE_SIZE >
 472                     get_rfc1002_len(work->request_buf)) {
 473                         pr_err("next command(%u) offset exceeds smb msg size\n",
 474                                next_cmd);
 475                         return false;
 476                 }
 477
 478                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 479                 init_chained_smb2_rsp(work);
 480                 return true;
 481         } else if (work->next_smb2_rcv_hdr_off) {
 482                 /*
 483                  * This is last request in chained command,
 484                  * align response to 8 byte
 485                  */
 486                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 487                 len = len - get_rfc1002_len(work->response_buf);
 488                 if (len) {
 489                         ksmbd_debug(SMB, "padding len %u\n", len);
 490                         inc_rfc1001_len(work->response_buf, len);
 491                         if (work->aux_payload_sz)
 492                                 work->aux_payload_sz += len;
 493                 }
 494         }
 495         return false;
 496 }
 497
 498 /**
 499  * init_smb2_rsp_hdr() - initialize smb2 response
 500  * @work:       smb work containing smb request buffer
 501  *
 502  * Return:      0
 503  */
 504 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 505 {
 506         struct smb2_hdr *rsp_hdr = work->response_buf;
 507         struct smb2_hdr *rcv_hdr = work->request_buf;
 508         struct ksmbd_conn *conn = work->conn;
 509
 510         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 511         rsp_hdr->smb2_buf_length =
 512                 cpu_to_be32(smb2_hdr_size_no_buflen(conn->vals));
 513         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 514         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 515         rsp_hdr->Command = rcv_hdr->Command;
 516
 517         /*
 518          * Message is response. We don't grant oplock yet.
 519          */
 520         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 521         rsp_hdr->NextCommand = 0;
 522         rsp_hdr->MessageId = rcv_hdr->MessageId;
 523         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 524         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 525         rsp_hdr->SessionId = rcv_hdr->SessionId;
 526         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 527
 528         work->syncronous = true;
 529         if (work->async_id) {
 530                 ksmbd_release_id(&conn->async_ida, work->async_id);
 531                 work->async_id = 0;
 532         }
 533
 534         return 0;
 535 }
 536
 537 /**
 538  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 539  * @work:       smb work containing smb request buffer
 540  *
 541  * Return:      0 on success, otherwise -ENOMEM
 542  */
 543 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 544 {
 545         struct smb2_hdr *hdr = work->request_buf;
 546         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 547         size_t large_sz = work->conn->vals->max_trans_size + MAX_SMB2_HDR_SIZE;
 548         size_t sz = small_sz;
 549         int cmd = le16_to_cpu(hdr->Command);
 550
 551         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 552                 sz = large_sz;
 553
 554         if (cmd == SMB2_QUERY_INFO_HE) {
 555                 struct smb2_query_info_req *req;
 556
 557                 req = work->request_buf;
 558                 if (req->InfoType == SMB2_O_INFO_FILE &&
 559                     (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 560                      req->FileInfoClass == FILE_ALL_INFORMATION))
 561                         sz = large_sz;
 562         }
 563
 564         /* allocate large response buf for chained commands */
 565         if (le32_to_cpu(hdr->NextCommand) > 0)
 566                 sz = large_sz;
 567
 568         work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
 569         if (!work->response_buf)
 570                 return -ENOMEM;
 571
 572         work->response_sz = sz;
 573         return 0;
 574 }
 575
 576 /**
 577  * smb2_check_user_session() - check for valid session for a user
 578  * @work:       smb work containing smb request buffer
 579  *
 580  * Return:      0 on success, otherwise error
 581  */
 582 int smb2_check_user_session(struct ksmbd_work *work)
 583 {
 584         struct smb2_hdr *req_hdr = work->request_buf;
 585         struct ksmbd_conn *conn = work->conn;
 586         unsigned int cmd = conn->ops->get_cmd_val(work);
 587         unsigned long long sess_id;
 588
 589         work->sess = NULL;
 590         /*
 591          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 592          * require a session id, so no need to validate user session's for
 593          * these commands.
 594          */
 595         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 596             cmd == SMB2_SESSION_SETUP_HE)
 597                 return 0;
 598
 599         if (!ksmbd_conn_good(work))
 600                 return -EINVAL;
 601
 602         sess_id = le64_to_cpu(req_hdr->SessionId);
 603         /* Check for validity of user session */
 604         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 605         if (work->sess)
 606                 return 1;
 607         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 608         return -EINVAL;
 609 }
 610
 611 static void destroy_previous_session(struct ksmbd_user *user, u64 id)
 612 {
 613         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 614         struct ksmbd_user *prev_user;
 615
 616         if (!prev_sess)
 617                 return;
 618
 619         prev_user = prev_sess->user;
 620
 621         if (!prev_user ||
 622             strcmp(user->name, prev_user->name) ||
 623             user->passkey_sz != prev_user->passkey_sz ||
 624             memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) {
 625                 put_session(prev_sess);
 626                 return;
 627         }
 628
 629         put_session(prev_sess);
 630         ksmbd_session_destroy(prev_sess);
 631 }
 632
 633 /**
 634  * smb2_get_name() - get filename string from on the wire smb format
 635  * @share:      ksmbd_share_config pointer
 636  * @src:        source buffer
 637  * @maxlen:     maxlen of source string
 638  * @nls_table:  nls_table pointer
 639  *
 640  * Return:      matching converted filename on success, otherwise error ptr
 641  */
 642 static char *
 643 smb2_get_name(struct ksmbd_share_config *share, const char *src,
 644               const int maxlen, struct nls_table *local_nls)
 645 {
 646         char *name;
 647
 648         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 649         if (IS_ERR(name)) {
 650                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 651                 return name;
 652         }
 653
 654         ksmbd_conv_path_to_unix(name);
 655         ksmbd_strip_last_slash(name);
 656         return name;
 657 }
 658
 659 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 660 {
 661         struct smb2_hdr *rsp_hdr;
 662         struct ksmbd_conn *conn = work->conn;
 663         int id;
 664
 665         rsp_hdr = work->response_buf;
 666         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 667
 668         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 669         if (id < 0) {
 670                 pr_err("Failed to alloc async message id\n");
 671                 return id;
 672         }
 673         work->syncronous = false;
 674         work->async_id = id;
 675         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 676
 677         ksmbd_debug(SMB,
 678                     "Send interim Response to inform async request id : %d\n",
 679                     work->async_id);
 680
 681         work->cancel_fn = fn;
 682         work->cancel_argv = arg;
 683
 684         if (list_empty(&work->async_request_entry)) {
 685                 spin_lock(&conn->request_lock);
 686                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 687                 spin_unlock(&conn->request_lock);
 688         }
 689
 690         return 0;
 691 }
 692
 693 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 694 {
 695         struct smb2_hdr *rsp_hdr;
 696
 697         rsp_hdr = work->response_buf;
 698         smb2_set_err_rsp(work);
 699         rsp_hdr->Status = status;
 700
 701         work->multiRsp = 1;
 702         ksmbd_conn_write(work);
 703         rsp_hdr->Status = 0;
 704         work->multiRsp = 0;
 705 }
 706
 707 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 708 {
 709         if (S_ISDIR(mode) || S_ISREG(mode))
 710                 return 0;
 711
 712         if (S_ISLNK(mode))
 713                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 714         else if (S_ISFIFO(mode))
 715                 return IO_REPARSE_TAG_LX_FIFO_LE;
 716         else if (S_ISSOCK(mode))
 717                 return IO_REPARSE_TAG_AF_UNIX_LE;
 718         else if (S_ISCHR(mode))
 719                 return IO_REPARSE_TAG_LX_CHR_LE;
 720         else if (S_ISBLK(mode))
 721                 return IO_REPARSE_TAG_LX_BLK_LE;
 722
 723         return 0;
 724 }
 725
 726 /**
 727  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 728  * @stat:       kstat containing file mode
 729  * @attribute:  attribute flags
 730  *
 731  * Return:      converted dos mode
 732  */
 733 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 734 {
 735         int attr = 0;
 736
 737         if (S_ISDIR(stat->mode)) {
 738                 attr = ATTR_DIRECTORY |
 739                         (attribute & (ATTR_HIDDEN | ATTR_SYSTEM));
 740         } else {
 741                 attr = (attribute & 0x00005137) | ATTR_ARCHIVE;
 742                 attr &= ~(ATTR_DIRECTORY);
 743                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 744                                 FILE_SUPPORTS_SPARSE_FILES))
 745                         attr |= ATTR_SPARSE;
 746
 747                 if (smb2_get_reparse_tag_special_file(stat->mode))
 748                         attr |= ATTR_REPARSE;
 749         }
 750
 751         return attr;
 752 }
 753
 754 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 755                                __le16 hash_id)
 756 {
 757         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 758         pneg_ctxt->DataLength = cpu_to_le16(38);
 759         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 760         pneg_ctxt->Reserved = cpu_to_le32(0);
 761         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 762         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 763         pneg_ctxt->HashAlgorithms = hash_id;
 764 }
 765
 766 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 767                                __le16 cipher_type)
 768 {
 769         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 770         pneg_ctxt->DataLength = cpu_to_le16(4);
 771         pneg_ctxt->Reserved = cpu_to_le32(0);
 772         pneg_ctxt->CipherCount = cpu_to_le16(1);
 773         pneg_ctxt->Ciphers[0] = cipher_type;
 774 }
 775
 776 static void build_compression_ctxt(struct smb2_compression_ctx *pneg_ctxt,
 777                                    __le16 comp_algo)
 778 {
 779         pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
 780         pneg_ctxt->DataLength =
 781                 cpu_to_le16(sizeof(struct smb2_compression_ctx)
 782                         - sizeof(struct smb2_neg_context));
 783         pneg_ctxt->Reserved = cpu_to_le32(0);
 784         pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
 785         pneg_ctxt->Reserved1 = cpu_to_le32(0);
 786         pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
 787 }
 788
 789 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 790                                 __le16 sign_algo)
 791 {
 792         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 793         pneg_ctxt->DataLength =
 794                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 795                         - sizeof(struct smb2_neg_context));
 796         pneg_ctxt->Reserved = cpu_to_le32(0);
 797         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 798         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 799 }
 800
 801 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 802 {
 803         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 804         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 805         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 806         pneg_ctxt->Name[0] = 0x93;
 807         pneg_ctxt->Name[1] = 0xAD;
 808         pneg_ctxt->Name[2] = 0x25;
 809         pneg_ctxt->Name[3] = 0x50;
 810         pneg_ctxt->Name[4] = 0x9C;
 811         pneg_ctxt->Name[5] = 0xB4;
 812         pneg_ctxt->Name[6] = 0x11;
 813         pneg_ctxt->Name[7] = 0xE7;
 814         pneg_ctxt->Name[8] = 0xB4;
 815         pneg_ctxt->Name[9] = 0x23;
 816         pneg_ctxt->Name[10] = 0x83;
 817         pneg_ctxt->Name[11] = 0xDE;
 818         pneg_ctxt->Name[12] = 0x96;
 819         pneg_ctxt->Name[13] = 0x8B;
 820         pneg_ctxt->Name[14] = 0xCD;
 821         pneg_ctxt->Name[15] = 0x7C;
 822 }
 823
 824 static void assemble_neg_contexts(struct ksmbd_conn *conn,
 825                                   struct smb2_negotiate_rsp *rsp)
 826 {
 827         /* +4 is to account for the RFC1001 len field */
 828         char *pneg_ctxt = (char *)rsp +
 829                         le32_to_cpu(rsp->NegotiateContextOffset) + 4;
 830         int neg_ctxt_cnt = 1;
 831         int ctxt_size;
 832
 833         ksmbd_debug(SMB,
 834                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 835         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 836                            conn->preauth_info->Preauth_HashId);
 837         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 838         inc_rfc1001_len(rsp, AUTH_GSS_PADDING);
 839         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 840         /* Round to 8 byte boundary */
 841         pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
 842
 843         if (conn->cipher_type) {
 844                 ctxt_size = round_up(ctxt_size, 8);
 845                 ksmbd_debug(SMB,
 846                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 847                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
 848                                    conn->cipher_type);
 849                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 850                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 851                 /* Round to 8 byte boundary */
 852                 pneg_ctxt +=
 853                         round_up(sizeof(struct smb2_encryption_neg_context) + 2,
 854                                  8);
 855         }
 856
 857         if (conn->compress_algorithm) {
 858                 ctxt_size = round_up(ctxt_size, 8);
 859                 ksmbd_debug(SMB,
 860                             "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
 861                 /* Temporarily set to SMB3_COMPRESS_NONE */
 862                 build_compression_ctxt((struct smb2_compression_ctx *)pneg_ctxt,
 863                                        conn->compress_algorithm);
 864                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 865                 ctxt_size += sizeof(struct smb2_compression_ctx) + 2;
 866                 /* Round to 8 byte boundary */
 867                 pneg_ctxt += round_up(sizeof(struct smb2_compression_ctx) + 2,
 868                                       8);
 869         }
 870
 871         if (conn->posix_ext_supported) {
 872                 ctxt_size = round_up(ctxt_size, 8);
 873                 ksmbd_debug(SMB,
 874                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 875                 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
 876                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 877                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 878                 /* Round to 8 byte boundary */
 879                 pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
 880         }
 881
 882         if (conn->signing_negotiated) {
 883                 ctxt_size = round_up(ctxt_size, 8);
 884                 ksmbd_debug(SMB,
 885                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 886                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
 887                                     conn->signing_algorithm);
 888                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 889                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 890         }
 891
 892         inc_rfc1001_len(rsp, ctxt_size);
 893 }
 894
 895 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 896                                   struct smb2_preauth_neg_context *pneg_ctxt)
 897 {
 898         __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 899
 900         if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
 901                 conn->preauth_info->Preauth_HashId =
 902                         SMB2_PREAUTH_INTEGRITY_SHA512;
 903                 err = STATUS_SUCCESS;
 904         }
 905
 906         return err;
 907 }
 908
 909 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 910                                 struct smb2_encryption_neg_context *pneg_ctxt,
 911                                 int len_of_ctxts)
 912 {
 913         int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 914         int i, cphs_size = cph_cnt * sizeof(__le16);
 915
 916         conn->cipher_type = 0;
 917
 918         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 919             len_of_ctxts) {
 920                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 921                 return;
 922         }
 923
 924         if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
 925                 return;
 926
 927         for (i = 0; i < cph_cnt; i++) {
 928                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 929                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 930                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 931                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 932                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 933                                     pneg_ctxt->Ciphers[i]);
 934                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 935                         break;
 936                 }
 937         }
 938 }
 939
 940 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 941                                  struct smb2_compression_ctx *pneg_ctxt)
 942 {
 943         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 944 }
 945
 946 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 947                                  struct smb2_signing_capabilities *pneg_ctxt,
 948                                  int len_of_ctxts)
 949 {
 950         int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 951         int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
 952
 953         conn->signing_negotiated = false;
 954
 955         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 956             len_of_ctxts) {
 957                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 958                 return;
 959         }
 960
 961         for (i = 0; i < sign_algo_cnt; i++) {
 962                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256 ||
 963                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC) {
 964                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 965                                     pneg_ctxt->SigningAlgorithms[i]);
 966                         conn->signing_negotiated = true;
 967                         conn->signing_algorithm =
 968                                 pneg_ctxt->SigningAlgorithms[i];
 969                         break;
 970                 }
 971         }
 972 }
 973
 974 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 975                                       struct smb2_negotiate_req *req)
 976 {
 977         /* +4 is to account for the RFC1001 len field */
 978         struct smb2_neg_context *pctx = (struct smb2_neg_context *)((char *)req + 4);
 979         int i = 0, len_of_ctxts;
 980         int offset = le32_to_cpu(req->NegotiateContextOffset);
 981         int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
 982         int len_of_smb = be32_to_cpu(req->hdr.smb2_buf_length);
 983         __le32 status = STATUS_INVALID_PARAMETER;
 984
 985         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
 986         if (len_of_smb <= offset) {
 987                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
 988                 return status;
 989         }
 990
 991         len_of_ctxts = len_of_smb - offset;
 992
 993         while (i++ < neg_ctxt_cnt) {
 994                 int clen;
 995
 996                 /* check that offset is not beyond end of SMB */
 997                 if (len_of_ctxts == 0)
 998                         break;
 999
1000                 if (len_of_ctxts < sizeof(struct smb2_neg_context))
1001                         break;
1002
1003                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1004                 clen = le16_to_cpu(pctx->DataLength);
1005                 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
1006                         break;
1007
1008                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1009                         ksmbd_debug(SMB,
1010                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1011                         if (conn->preauth_info->Preauth_HashId)
1012                                 break;
1013
1014                         status = decode_preauth_ctxt(conn,
1015                                                      (struct smb2_preauth_neg_context *)pctx);
1016                         if (status != STATUS_SUCCESS)
1017                                 break;
1018                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1019                         ksmbd_debug(SMB,
1020                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1021                         if (conn->cipher_type)
1022                                 break;
1023
1024                         decode_encrypt_ctxt(conn,
1025                                             (struct smb2_encryption_neg_context *)pctx,
1026                                             len_of_ctxts);
1027                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1028                         ksmbd_debug(SMB,
1029                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1030                         if (conn->compress_algorithm)
1031                                 break;
1032
1033                         decode_compress_ctxt(conn,
1034                                              (struct smb2_compression_ctx *)pctx);
1035                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1036                         ksmbd_debug(SMB,
1037                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1038                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1039                         ksmbd_debug(SMB,
1040                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1041                         conn->posix_ext_supported = true;
1042                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1043                         ksmbd_debug(SMB,
1044                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1045                         decode_sign_cap_ctxt(conn,
1046                                              (struct smb2_signing_capabilities *)pctx,
1047                                              len_of_ctxts);
1048                 }
1049
1050                 /* offsets must be 8 byte aligned */
1051                 clen = (clen + 7) & ~0x7;
1052                 offset = clen + sizeof(struct smb2_neg_context);
1053                 len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1054         }
1055         return status;
1056 }
1057
1058 /**
1059  * smb2_handle_negotiate() - handler for smb2 negotiate command
1060  * @work:       smb work containing smb request buffer
1061  *
1062  * Return:      0
1063  */
1064 int smb2_handle_negotiate(struct ksmbd_work *work)
1065 {
1066         struct ksmbd_conn *conn = work->conn;
1067         struct smb2_negotiate_req *req = work->request_buf;
1068         struct smb2_negotiate_rsp *rsp = work->response_buf;
1069         int rc = 0;
1070         unsigned int smb2_buf_len, smb2_neg_size;
1071         __le32 status;
1072
1073         ksmbd_debug(SMB, "Received negotiate request\n");
1074         conn->need_neg = false;
1075         if (ksmbd_conn_good(work)) {
1076                 pr_err("conn->tcp_status is already in CifsGood State\n");
1077                 work->send_no_response = 1;
1078                 return rc;
1079         }
1080
1081         if (req->DialectCount == 0) {
1082                 pr_err("malformed packet\n");
1083                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1084                 rc = -EINVAL;
1085                 goto err_out;
1086         }
1087
1088         smb2_buf_len = get_rfc1002_len(work->request_buf);
1089         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects) - 4;
1090         if (smb2_neg_size > smb2_buf_len) {
1091                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1092                 rc = -EINVAL;
1093                 goto err_out;
1094         }
1095
1096         if (conn->dialect == SMB311_PROT_ID) {
1097                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1098
1099                 if (smb2_buf_len < nego_ctxt_off) {
1100                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1101                         rc = -EINVAL;
1102                         goto err_out;
1103                 }
1104
1105                 if (smb2_neg_size > nego_ctxt_off) {
1106                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1107                         rc = -EINVAL;
1108                         goto err_out;
1109                 }
1110
1111                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1112                     nego_ctxt_off) {
1113                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1114                         rc = -EINVAL;
1115                         goto err_out;
1116                 }
1117         } else {
1118                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1119                     smb2_buf_len) {
1120                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1121                         rc = -EINVAL;
1122                         goto err_out;
1123                 }
1124         }
1125
1126         conn->cli_cap = le32_to_cpu(req->Capabilities);
1127         switch (conn->dialect) {
1128         case SMB311_PROT_ID:
1129                 conn->preauth_info =
1130                         kzalloc(sizeof(struct preauth_integrity_info),
1131                                 GFP_KERNEL);
1132                 if (!conn->preauth_info) {
1133                         rc = -ENOMEM;
1134                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1135                         goto err_out;
1136                 }
1137
1138                 status = deassemble_neg_contexts(conn, req);
1139                 if (status != STATUS_SUCCESS) {
1140                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1141                                status);
1142                         rsp->hdr.Status = status;
1143                         rc = -EINVAL;
1144                         goto err_out;
1145                 }
1146
1147                 rc = init_smb3_11_server(conn);
1148                 if (rc < 0) {
1149                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1150                         goto err_out;
1151                 }
1152
1153                 ksmbd_gen_preauth_integrity_hash(conn,
1154                                                  work->request_buf,
1155                                                  conn->preauth_info->Preauth_HashValue);
1156                 rsp->NegotiateContextOffset =
1157                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1158                 assemble_neg_contexts(conn, rsp);
1159                 break;
1160         case SMB302_PROT_ID:
1161                 init_smb3_02_server(conn);
1162                 break;
1163         case SMB30_PROT_ID:
1164                 init_smb3_0_server(conn);
1165                 break;
1166         case SMB21_PROT_ID:
1167                 init_smb2_1_server(conn);
1168                 break;
1169         case SMB20_PROT_ID:
1170                 rc = init_smb2_0_server(conn);
1171                 if (rc) {
1172                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1173                         goto err_out;
1174                 }
1175                 break;
1176         case SMB2X_PROT_ID:
1177         case BAD_PROT_ID:
1178         default:
1179                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1180                             conn->dialect);
1181                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1182                 rc = -EINVAL;
1183                 goto err_out;
1184         }
1185         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1186
1187         /* For stats */
1188         conn->connection_type = conn->dialect;
1189
1190         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1191         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1192         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1193
1194         if (conn->dialect > SMB20_PROT_ID) {
1195                 memcpy(conn->ClientGUID, req->ClientGUID,
1196                        SMB2_CLIENT_GUID_SIZE);
1197                 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1198         }
1199
1200         rsp->StructureSize = cpu_to_le16(65);
1201         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1202         /* Not setting conn guid rsp->ServerGUID, as it
1203          * not used by client for identifying server
1204          */
1205         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1206
1207         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1208         rsp->ServerStartTime = 0;
1209         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1210                     le32_to_cpu(rsp->NegotiateContextOffset),
1211                     le16_to_cpu(rsp->NegotiateContextCount));
1212
1213         rsp->SecurityBufferOffset = cpu_to_le16(128);
1214         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1215         ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
1216                                   sizeof(rsp->hdr.smb2_buf_length)) +
1217                                    le16_to_cpu(rsp->SecurityBufferOffset));
1218         inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
1219                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1220                          AUTH_GSS_LENGTH);
1221         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1222         conn->use_spnego = true;
1223
1224         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1225              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1226             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1227                 conn->sign = true;
1228         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1229                 server_conf.enforced_signing = true;
1230                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1231                 conn->sign = true;
1232         }
1233
1234         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1235         ksmbd_conn_set_need_negotiate(work);
1236
1237 err_out:
1238         if (rc < 0)
1239                 smb2_set_err_rsp(work);
1240
1241         return rc;
1242 }
1243
1244 static int alloc_preauth_hash(struct ksmbd_session *sess,
1245                               struct ksmbd_conn *conn)
1246 {
1247         if (sess->Preauth_HashValue)
1248                 return 0;
1249
1250         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1251                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1252         if (!sess->Preauth_HashValue)
1253                 return -ENOMEM;
1254
1255         return 0;
1256 }
1257
1258 static int generate_preauth_hash(struct ksmbd_work *work)
1259 {
1260         struct ksmbd_conn *conn = work->conn;
1261         struct ksmbd_session *sess = work->sess;
1262         u8 *preauth_hash;
1263
1264         if (conn->dialect != SMB311_PROT_ID)
1265                 return 0;
1266
1267         if (conn->binding) {
1268                 struct preauth_session *preauth_sess;
1269
1270                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1271                 if (!preauth_sess) {
1272                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1273                         if (!preauth_sess)
1274                                 return -ENOMEM;
1275                 }
1276
1277                 preauth_hash = preauth_sess->Preauth_HashValue;
1278         } else {
1279                 if (!sess->Preauth_HashValue)
1280                         if (alloc_preauth_hash(sess, conn))
1281                                 return -ENOMEM;
1282                 preauth_hash = sess->Preauth_HashValue;
1283         }
1284
1285         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1286         return 0;
1287 }
1288
1289 static int decode_negotiation_token(struct ksmbd_work *work,
1290                                     struct negotiate_message *negblob)
1291 {
1292         struct ksmbd_conn *conn = work->conn;
1293         struct smb2_sess_setup_req *req;
1294         int sz;
1295
1296         if (!conn->use_spnego)
1297                 return -EINVAL;
1298
1299         req = work->request_buf;
1300         sz = le16_to_cpu(req->SecurityBufferLength);
1301
1302         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1303                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1304                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1305                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1306                         conn->use_spnego = false;
1307                 }
1308         }
1309         return 0;
1310 }
1311
1312 static int ntlm_negotiate(struct ksmbd_work *work,
1313                           struct negotiate_message *negblob)
1314 {
1315         struct smb2_sess_setup_req *req = work->request_buf;
1316         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1317         struct challenge_message *chgblob;
1318         unsigned char *spnego_blob = NULL;
1319         u16 spnego_blob_len;
1320         char *neg_blob;
1321         int sz, rc;
1322
1323         ksmbd_debug(SMB, "negotiate phase\n");
1324         sz = le16_to_cpu(req->SecurityBufferLength);
1325         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, sz, work->sess);
1326         if (rc)
1327                 return rc;
1328
1329         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1330         chgblob =
1331                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1332         memset(chgblob, 0, sizeof(struct challenge_message));
1333
1334         if (!work->conn->use_spnego) {
1335                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
1336                 if (sz < 0)
1337                         return -ENOMEM;
1338
1339                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1340                 return 0;
1341         }
1342
1343         sz = sizeof(struct challenge_message);
1344         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1345
1346         neg_blob = kzalloc(sz, GFP_KERNEL);
1347         if (!neg_blob)
1348                 return -ENOMEM;
1349
1350         chgblob = (struct challenge_message *)neg_blob;
1351         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
1352         if (sz < 0) {
1353                 rc = -ENOMEM;
1354                 goto out;
1355         }
1356
1357         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1358                                            neg_blob, sz);
1359         if (rc) {
1360                 rc = -ENOMEM;
1361                 goto out;
1362         }
1363
1364         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1365         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1366         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1367
1368 out:
1369         kfree(spnego_blob);
1370         kfree(neg_blob);
1371         return rc;
1372 }
1373
1374 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1375                                                   struct smb2_sess_setup_req *req)
1376 {
1377         int sz;
1378
1379         if (conn->use_spnego && conn->mechToken)
1380                 return (struct authenticate_message *)conn->mechToken;
1381
1382         sz = le16_to_cpu(req->SecurityBufferOffset);
1383         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1384                                                + sz);
1385 }
1386
1387 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1388                                        struct smb2_sess_setup_req *req)
1389 {
1390         struct authenticate_message *authblob;
1391         struct ksmbd_user *user;
1392         char *name;
1393         int sz;
1394
1395         authblob = user_authblob(conn, req);
1396         sz = le32_to_cpu(authblob->UserName.BufferOffset);
1397         name = smb_strndup_from_utf16((const char *)authblob + sz,
1398                                       le16_to_cpu(authblob->UserName.Length),
1399                                       true,
1400                                       conn->local_nls);
1401         if (IS_ERR(name)) {
1402                 pr_err("cannot allocate memory\n");
1403                 return NULL;
1404         }
1405
1406         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1407         user = ksmbd_login_user(name);
1408         kfree(name);
1409         return user;
1410 }
1411
1412 static int ntlm_authenticate(struct ksmbd_work *work)
1413 {
1414         struct smb2_sess_setup_req *req = work->request_buf;
1415         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1416         struct ksmbd_conn *conn = work->conn;
1417         struct ksmbd_session *sess = work->sess;
1418         struct channel *chann = NULL;
1419         struct ksmbd_user *user;
1420         u64 prev_id;
1421         int sz, rc;
1422
1423         ksmbd_debug(SMB, "authenticate phase\n");
1424         if (conn->use_spnego) {
1425                 unsigned char *spnego_blob;
1426                 u16 spnego_blob_len;
1427
1428                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1429                                                     &spnego_blob_len,
1430                                                     0);
1431                 if (rc)
1432                         return -ENOMEM;
1433
1434                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1435                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1436                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1437                 kfree(spnego_blob);
1438                 inc_rfc1001_len(rsp, spnego_blob_len - 1);
1439         }
1440
1441         user = session_user(conn, req);
1442         if (!user) {
1443                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1444                 return -EPERM;
1445         }
1446
1447         /* Check for previous session */
1448         prev_id = le64_to_cpu(req->PreviousSessionId);
1449         if (prev_id && prev_id != sess->id)
1450                 destroy_previous_session(user, prev_id);
1451
1452         if (sess->state == SMB2_SESSION_VALID) {
1453                 /*
1454                  * Reuse session if anonymous try to connect
1455                  * on reauthetication.
1456                  */
1457                 if (ksmbd_anonymous_user(user)) {
1458                         ksmbd_free_user(user);
1459                         return 0;
1460                 }
1461                 ksmbd_free_user(sess->user);
1462         }
1463
1464         sess->user = user;
1465         if (user_guest(sess->user)) {
1466                 if (conn->sign) {
1467                         ksmbd_debug(SMB, "Guest login not allowed when signing enabled\n");
1468                         return -EPERM;
1469                 }
1470
1471                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1472         } else {
1473                 struct authenticate_message *authblob;
1474
1475                 authblob = user_authblob(conn, req);
1476                 sz = le16_to_cpu(req->SecurityBufferLength);
1477                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, sess);
1478                 if (rc) {
1479                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1480                         ksmbd_debug(SMB, "authentication failed\n");
1481                         return -EPERM;
1482                 }
1483
1484                 /*
1485                  * If session state is SMB2_SESSION_VALID, We can assume
1486                  * that it is reauthentication. And the user/password
1487                  * has been verified, so return it here.
1488                  */
1489                 if (sess->state == SMB2_SESSION_VALID) {
1490                         if (conn->binding)
1491                                 goto binding_session;
1492                         return 0;
1493                 }
1494
1495                 if ((conn->sign || server_conf.enforced_signing) ||
1496                     (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1497                         sess->sign = true;
1498
1499                 if (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION &&
1500                     conn->ops->generate_encryptionkey &&
1501                     !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1502                         rc = conn->ops->generate_encryptionkey(sess);
1503                         if (rc) {
1504                                 ksmbd_debug(SMB,
1505                                             "SMB3 encryption key generation failed\n");
1506                                 return -EINVAL;
1507                         }
1508                         sess->enc = true;
1509                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1510                         /*
1511                          * signing is disable if encryption is enable
1512                          * on this session
1513                          */
1514                         sess->sign = false;
1515                 }
1516         }
1517
1518 binding_session:
1519         if (conn->dialect >= SMB30_PROT_ID) {
1520                 chann = lookup_chann_list(sess, conn);
1521                 if (!chann) {
1522                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1523                         if (!chann)
1524                                 return -ENOMEM;
1525
1526                         chann->conn = conn;
1527                         INIT_LIST_HEAD(&chann->chann_list);
1528                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1529                 }
1530         }
1531
1532         if (conn->ops->generate_signingkey) {
1533                 rc = conn->ops->generate_signingkey(sess, conn);
1534                 if (rc) {
1535                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1536                         return -EINVAL;
1537                 }
1538         }
1539
1540         if (conn->dialect > SMB20_PROT_ID) {
1541                 if (!ksmbd_conn_lookup_dialect(conn)) {
1542                         pr_err("fail to verify the dialect\n");
1543                         return -ENOENT;
1544                 }
1545         }
1546         return 0;
1547 }
1548
1549 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1550 static int krb5_authenticate(struct ksmbd_work *work)
1551 {
1552         struct smb2_sess_setup_req *req = work->request_buf;
1553         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1554         struct ksmbd_conn *conn = work->conn;
1555         struct ksmbd_session *sess = work->sess;
1556         char *in_blob, *out_blob;
1557         struct channel *chann = NULL;
1558         u64 prev_sess_id;
1559         int in_len, out_len;
1560         int retval;
1561
1562         in_blob = (char *)&req->hdr.ProtocolId +
1563                 le16_to_cpu(req->SecurityBufferOffset);
1564         in_len = le16_to_cpu(req->SecurityBufferLength);
1565         out_blob = (char *)&rsp->hdr.ProtocolId +
1566                 le16_to_cpu(rsp->SecurityBufferOffset);
1567         out_len = work->response_sz -
1568                 offsetof(struct smb2_hdr, smb2_buf_length) -
1569                 le16_to_cpu(rsp->SecurityBufferOffset);
1570
1571         /* Check previous session */
1572         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1573         if (prev_sess_id && prev_sess_id != sess->id)
1574                 destroy_previous_session(sess->user, prev_sess_id);
1575
1576         if (sess->state == SMB2_SESSION_VALID)
1577                 ksmbd_free_user(sess->user);
1578
1579         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1580                                          out_blob, &out_len);
1581         if (retval) {
1582                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1583                 return -EINVAL;
1584         }
1585         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1586         inc_rfc1001_len(rsp, out_len - 1);
1587
1588         if ((conn->sign || server_conf.enforced_signing) ||
1589             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1590                 sess->sign = true;
1591
1592         if ((conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) &&
1593             conn->ops->generate_encryptionkey) {
1594                 retval = conn->ops->generate_encryptionkey(sess);
1595                 if (retval) {
1596                         ksmbd_debug(SMB,
1597                                     "SMB3 encryption key generation failed\n");
1598                         return -EINVAL;
1599                 }
1600                 sess->enc = true;
1601                 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1602                 sess->sign = false;
1603         }
1604
1605         if (conn->dialect >= SMB30_PROT_ID) {
1606                 chann = lookup_chann_list(sess, conn);
1607                 if (!chann) {
1608                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1609                         if (!chann)
1610                                 return -ENOMEM;
1611
1612                         chann->conn = conn;
1613                         INIT_LIST_HEAD(&chann->chann_list);
1614                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1615                 }
1616         }
1617
1618         if (conn->ops->generate_signingkey) {
1619                 retval = conn->ops->generate_signingkey(sess, conn);
1620                 if (retval) {
1621                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1622                         return -EINVAL;
1623                 }
1624         }
1625
1626         if (conn->dialect > SMB20_PROT_ID) {
1627                 if (!ksmbd_conn_lookup_dialect(conn)) {
1628                         pr_err("fail to verify the dialect\n");
1629                         return -ENOENT;
1630                 }
1631         }
1632         return 0;
1633 }
1634 #else
1635 static int krb5_authenticate(struct ksmbd_work *work)
1636 {
1637         return -EOPNOTSUPP;
1638 }
1639 #endif
1640
1641 int smb2_sess_setup(struct ksmbd_work *work)
1642 {
1643         struct ksmbd_conn *conn = work->conn;
1644         struct smb2_sess_setup_req *req = work->request_buf;
1645         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1646         struct ksmbd_session *sess;
1647         struct negotiate_message *negblob;
1648         int rc = 0;
1649
1650         ksmbd_debug(SMB, "Received request for session setup\n");
1651
1652         rsp->StructureSize = cpu_to_le16(9);
1653         rsp->SessionFlags = 0;
1654         rsp->SecurityBufferOffset = cpu_to_le16(72);
1655         rsp->SecurityBufferLength = 0;
1656         inc_rfc1001_len(rsp, 9);
1657
1658         if (!req->hdr.SessionId) {
1659                 sess = ksmbd_smb2_session_create();
1660                 if (!sess) {
1661                         rc = -ENOMEM;
1662                         goto out_err;
1663                 }
1664                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1665                 ksmbd_session_register(conn, sess);
1666         } else if (conn->dialect >= SMB30_PROT_ID &&
1667                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1668                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1669                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1670
1671                 sess = ksmbd_session_lookup_slowpath(sess_id);
1672                 if (!sess) {
1673                         rc = -ENOENT;
1674                         goto out_err;
1675                 }
1676
1677                 if (conn->dialect != sess->conn->dialect) {
1678                         rc = -EINVAL;
1679                         goto out_err;
1680                 }
1681
1682                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1683                         rc = -EINVAL;
1684                         goto out_err;
1685                 }
1686
1687                 if (strncmp(conn->ClientGUID, sess->conn->ClientGUID,
1688                             SMB2_CLIENT_GUID_SIZE)) {
1689                         rc = -ENOENT;
1690                         goto out_err;
1691                 }
1692
1693                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1694                         rc = -EACCES;
1695                         goto out_err;
1696                 }
1697
1698                 if (sess->state == SMB2_SESSION_EXPIRED) {
1699                         rc = -EFAULT;
1700                         goto out_err;
1701                 }
1702
1703                 if (ksmbd_session_lookup(conn, sess_id)) {
1704                         rc = -EACCES;
1705                         goto out_err;
1706                 }
1707
1708                 conn->binding = true;
1709         } else if ((conn->dialect < SMB30_PROT_ID ||
1710                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1711                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1712                 sess = NULL;
1713                 rc = -EACCES;
1714                 goto out_err;
1715         } else {
1716                 sess = ksmbd_session_lookup(conn,
1717                                             le64_to_cpu(req->hdr.SessionId));
1718                 if (!sess) {
1719                         rc = -ENOENT;
1720                         goto out_err;
1721                 }
1722         }
1723         work->sess = sess;
1724
1725         if (sess->state == SMB2_SESSION_EXPIRED)
1726                 sess->state = SMB2_SESSION_IN_PROGRESS;
1727
1728         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1729                         le16_to_cpu(req->SecurityBufferOffset));
1730
1731         if (decode_negotiation_token(work, negblob) == 0) {
1732                 if (conn->mechToken)
1733                         negblob = (struct negotiate_message *)conn->mechToken;
1734         }
1735
1736         if (server_conf.auth_mechs & conn->auth_mechs) {
1737                 rc = generate_preauth_hash(work);
1738                 if (rc)
1739                         goto out_err;
1740
1741                 if (conn->preferred_auth_mech &
1742                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1743                         rc = krb5_authenticate(work);
1744                         if (rc) {
1745                                 rc = -EINVAL;
1746                                 goto out_err;
1747                         }
1748
1749                         ksmbd_conn_set_good(work);
1750                         sess->state = SMB2_SESSION_VALID;
1751                         kfree(sess->Preauth_HashValue);
1752                         sess->Preauth_HashValue = NULL;
1753                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1754                         if (negblob->MessageType == NtLmNegotiate) {
1755                                 rc = ntlm_negotiate(work, negblob);
1756                                 if (rc)
1757                                         goto out_err;
1758                                 rsp->hdr.Status =
1759                                         STATUS_MORE_PROCESSING_REQUIRED;
1760                                 /*
1761                                  * Note: here total size -1 is done as an
1762                                  * adjustment for 0 size blob
1763                                  */
1764                                 inc_rfc1001_len(rsp, le16_to_cpu(rsp->SecurityBufferLength) - 1);
1765
1766                         } else if (negblob->MessageType == NtLmAuthenticate) {
1767                                 rc = ntlm_authenticate(work);
1768                                 if (rc)
1769                                         goto out_err;
1770
1771                                 ksmbd_conn_set_good(work);
1772                                 sess->state = SMB2_SESSION_VALID;
1773                                 if (conn->binding) {
1774                                         struct preauth_session *preauth_sess;
1775
1776                                         preauth_sess =
1777                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1778                                         if (preauth_sess) {
1779                                                 list_del(&preauth_sess->preauth_entry);
1780                                                 kfree(preauth_sess);
1781                                         }
1782                                 }
1783                                 kfree(sess->Preauth_HashValue);
1784                                 sess->Preauth_HashValue = NULL;
1785                         }
1786                 } else {
1787                         /* TODO: need one more negotiation */
1788                         pr_err("Not support the preferred authentication\n");
1789                         rc = -EINVAL;
1790                 }
1791         } else {
1792                 pr_err("Not support authentication\n");
1793                 rc = -EINVAL;
1794         }
1795
1796 out_err:
1797         if (rc == -EINVAL)
1798                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1799         else if (rc == -ENOENT)
1800                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1801         else if (rc == -EACCES)
1802                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1803         else if (rc == -EFAULT)
1804                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1805         else if (rc == -ENOMEM)
1806                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1807         else if (rc)
1808                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1809
1810         if (conn->use_spnego && conn->mechToken) {
1811                 kfree(conn->mechToken);
1812                 conn->mechToken = NULL;
1813         }
1814
1815         if (rc < 0 && sess) {
1816                 ksmbd_session_destroy(sess);
1817                 work->sess = NULL;
1818         }
1819
1820         return rc;
1821 }
1822
1823 /**
1824  * smb2_tree_connect() - handler for smb2 tree connect command
1825  * @work:       smb work containing smb request buffer
1826  *
1827  * Return:      0 on success, otherwise error
1828  */
1829 int smb2_tree_connect(struct ksmbd_work *work)
1830 {
1831         struct ksmbd_conn *conn = work->conn;
1832         struct smb2_tree_connect_req *req = work->request_buf;
1833         struct smb2_tree_connect_rsp *rsp = work->response_buf;
1834         struct ksmbd_session *sess = work->sess;
1835         char *treename = NULL, *name = NULL;
1836         struct ksmbd_tree_conn_status status;
1837         struct ksmbd_share_config *share;
1838         int rc = -EINVAL;
1839
1840         treename = smb_strndup_from_utf16(req->Buffer,
1841                                           le16_to_cpu(req->PathLength), true,
1842                                           conn->local_nls);
1843         if (IS_ERR(treename)) {
1844                 pr_err("treename is NULL\n");
1845                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1846                 goto out_err1;
1847         }
1848
1849         name = ksmbd_extract_sharename(treename);
1850         if (IS_ERR(name)) {
1851                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1852                 goto out_err1;
1853         }
1854
1855         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1856                     name, treename);
1857
1858         status = ksmbd_tree_conn_connect(sess, name);
1859         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1860                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1861         else
1862                 goto out_err1;
1863
1864         share = status.tree_conn->share_conf;
1865         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1866                 ksmbd_debug(SMB, "IPC share path request\n");
1867                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1868                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1869                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1870                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1871                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1872                         FILE_SYNCHRONIZE_LE;
1873         } else {
1874                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1875                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1876                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1877                 if (test_tree_conn_flag(status.tree_conn,
1878                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1879                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1880                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1881                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1882                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1883                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1884                                 FILE_SYNCHRONIZE_LE;
1885                 }
1886         }
1887
1888         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1889         if (conn->posix_ext_supported)
1890                 status.tree_conn->posix_extensions = true;
1891
1892 out_err1:
1893         rsp->StructureSize = cpu_to_le16(16);
1894         rsp->Capabilities = 0;
1895         rsp->Reserved = 0;
1896         /* default manual caching */
1897         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1898         inc_rfc1001_len(rsp, 16);
1899
1900         if (!IS_ERR(treename))
1901                 kfree(treename);
1902         if (!IS_ERR(name))
1903                 kfree(name);
1904
1905         switch (status.ret) {
1906         case KSMBD_TREE_CONN_STATUS_OK:
1907                 rsp->hdr.Status = STATUS_SUCCESS;
1908                 rc = 0;
1909                 break;
1910         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1911                 rsp->hdr.Status = STATUS_BAD_NETWORK_PATH;
1912                 break;
1913         case -ENOMEM:
1914         case KSMBD_TREE_CONN_STATUS_NOMEM:
1915                 rsp->hdr.Status = STATUS_NO_MEMORY;
1916                 break;
1917         case KSMBD_TREE_CONN_STATUS_ERROR:
1918         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1919         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1920                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1921                 break;
1922         case -EINVAL:
1923                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1924                 break;
1925         default:
1926                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1927         }
1928
1929         return rc;
1930 }
1931
1932 /**
1933  * smb2_create_open_flags() - convert smb open flags to unix open flags
1934  * @file_present:       is file already present
1935  * @access:             file access flags
1936  * @disposition:        file disposition flags
1937  * @may_flags:          set with MAY_ flags
1938  *
1939  * Return:      file open flags
1940  */
1941 static int smb2_create_open_flags(bool file_present, __le32 access,
1942                                   __le32 disposition,
1943                                   int *may_flags)
1944 {
1945         int oflags = O_NONBLOCK | O_LARGEFILE;
1946
1947         if (access & FILE_READ_DESIRED_ACCESS_LE &&
1948             access & FILE_WRITE_DESIRE_ACCESS_LE) {
1949                 oflags |= O_RDWR;
1950                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1951         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1952                 oflags |= O_WRONLY;
1953                 *may_flags = MAY_OPEN | MAY_WRITE;
1954         } else {
1955                 oflags |= O_RDONLY;
1956                 *may_flags = MAY_OPEN | MAY_READ;
1957         }
1958
1959         if (access == FILE_READ_ATTRIBUTES_LE)
1960                 oflags |= O_PATH;
1961
1962         if (file_present) {
1963                 switch (disposition & FILE_CREATE_MASK_LE) {
1964                 case FILE_OPEN_LE:
1965                 case FILE_CREATE_LE:
1966                         break;
1967                 case FILE_SUPERSEDE_LE:
1968                 case FILE_OVERWRITE_LE:
1969                 case FILE_OVERWRITE_IF_LE:
1970                         oflags |= O_TRUNC;
1971                         break;
1972                 default:
1973                         break;
1974                 }
1975         } else {
1976                 switch (disposition & FILE_CREATE_MASK_LE) {
1977                 case FILE_SUPERSEDE_LE:
1978                 case FILE_CREATE_LE:
1979                 case FILE_OPEN_IF_LE:
1980                 case FILE_OVERWRITE_IF_LE:
1981                         oflags |= O_CREAT;
1982                         break;
1983                 case FILE_OPEN_LE:
1984                 case FILE_OVERWRITE_LE:
1985                         oflags &= ~O_CREAT;
1986                         break;
1987                 default:
1988                         break;
1989                 }
1990         }
1991
1992         return oflags;
1993 }
1994
1995 /**
1996  * smb2_tree_disconnect() - handler for smb tree connect request
1997  * @work:       smb work containing request buffer
1998  *
1999  * Return:      0
2000  */
2001 int smb2_tree_disconnect(struct ksmbd_work *work)
2002 {
2003         struct smb2_tree_disconnect_rsp *rsp = work->response_buf;
2004         struct ksmbd_session *sess = work->sess;
2005         struct ksmbd_tree_connect *tcon = work->tcon;
2006
2007         rsp->StructureSize = cpu_to_le16(4);
2008         inc_rfc1001_len(rsp, 4);
2009
2010         ksmbd_debug(SMB, "request\n");
2011
2012         if (!tcon) {
2013                 struct smb2_tree_disconnect_req *req = work->request_buf;
2014
2015                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2016                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2017                 smb2_set_err_rsp(work);
2018                 return 0;
2019         }
2020
2021         ksmbd_close_tree_conn_fds(work);
2022         ksmbd_tree_conn_disconnect(sess, tcon);
2023         return 0;
2024 }
2025
2026 /**
2027  * smb2_session_logoff() - handler for session log off request
2028  * @work:       smb work containing request buffer
2029  *
2030  * Return:      0
2031  */
2032 int smb2_session_logoff(struct ksmbd_work *work)
2033 {
2034         struct ksmbd_conn *conn = work->conn;
2035         struct smb2_logoff_rsp *rsp = work->response_buf;
2036         struct ksmbd_session *sess = work->sess;
2037
2038         rsp->StructureSize = cpu_to_le16(4);
2039         inc_rfc1001_len(rsp, 4);
2040
2041         ksmbd_debug(SMB, "request\n");
2042
2043         /* Got a valid session, set connection state */
2044         WARN_ON(sess->conn != conn);
2045
2046         /* setting CifsExiting here may race with start_tcp_sess */
2047         ksmbd_conn_set_need_reconnect(work);
2048         ksmbd_close_session_fds(work);
2049         ksmbd_conn_wait_idle(conn);
2050
2051         if (ksmbd_tree_conn_session_logoff(sess)) {
2052                 struct smb2_logoff_req *req = work->request_buf;
2053
2054                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2055                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2056                 smb2_set_err_rsp(work);
2057                 return 0;
2058         }
2059
2060         ksmbd_destroy_file_table(&sess->file_table);
2061         sess->state = SMB2_SESSION_EXPIRED;
2062
2063         ksmbd_free_user(sess->user);
2064         sess->user = NULL;
2065
2066         /* let start_tcp_sess free connection info now */
2067         ksmbd_conn_set_need_negotiate(work);
2068         return 0;
2069 }
2070
2071 /**
2072  * create_smb2_pipe() - create IPC pipe
2073  * @work:       smb work containing request buffer
2074  *
2075  * Return:      0 on success, otherwise error
2076  */
2077 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2078 {
2079         struct smb2_create_rsp *rsp = work->response_buf;
2080         struct smb2_create_req *req = work->request_buf;
2081         int id;
2082         int err;
2083         char *name;
2084
2085         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2086                                       1, work->conn->local_nls);
2087         if (IS_ERR(name)) {
2088                 rsp->hdr.Status = STATUS_NO_MEMORY;
2089                 err = PTR_ERR(name);
2090                 goto out;
2091         }
2092
2093         id = ksmbd_session_rpc_open(work->sess, name);
2094         if (id < 0) {
2095                 pr_err("Unable to open RPC pipe: %d\n", id);
2096                 err = id;
2097                 goto out;
2098         }
2099
2100         rsp->hdr.Status = STATUS_SUCCESS;
2101         rsp->StructureSize = cpu_to_le16(89);
2102         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2103         rsp->Reserved = 0;
2104         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2105
2106         rsp->CreationTime = cpu_to_le64(0);
2107         rsp->LastAccessTime = cpu_to_le64(0);
2108         rsp->ChangeTime = cpu_to_le64(0);
2109         rsp->AllocationSize = cpu_to_le64(0);
2110         rsp->EndofFile = cpu_to_le64(0);
2111         rsp->FileAttributes = ATTR_NORMAL_LE;
2112         rsp->Reserved2 = 0;
2113         rsp->VolatileFileId = cpu_to_le64(id);
2114         rsp->PersistentFileId = 0;
2115         rsp->CreateContextsOffset = 0;
2116         rsp->CreateContextsLength = 0;
2117
2118         inc_rfc1001_len(rsp, 88); /* StructureSize - 1*/
2119         kfree(name);
2120         return 0;
2121
2122 out:
2123         switch (err) {
2124         case -EINVAL:
2125                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2126                 break;
2127         case -ENOSPC:
2128         case -ENOMEM:
2129                 rsp->hdr.Status = STATUS_NO_MEMORY;
2130                 break;
2131         }
2132
2133         if (!IS_ERR(name))
2134                 kfree(name);
2135
2136         smb2_set_err_rsp(work);
2137         return err;
2138 }
2139
2140 /**
2141  * smb2_set_ea() - handler for setting extended attributes using set
2142  *              info command
2143  * @eabuf:      set info command buffer
2144  * @buf_len:    set info command buffer length
2145  * @path:       dentry path for get ea
2146  *
2147  * Return:      0 on success, otherwise error
2148  */
2149 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2150                        struct path *path)
2151 {
2152         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2153         char *attr_name = NULL, *value;
2154         int rc = 0;
2155         unsigned int next = 0;
2156
2157         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2158                         le16_to_cpu(eabuf->EaValueLength))
2159                 return -EINVAL;
2160
2161         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2162         if (!attr_name)
2163                 return -ENOMEM;
2164
2165         do {
2166                 if (!eabuf->EaNameLength)
2167                         goto next;
2168
2169                 ksmbd_debug(SMB,
2170                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2171                             eabuf->name, eabuf->EaNameLength,
2172                             le16_to_cpu(eabuf->EaValueLength),
2173                             le32_to_cpu(eabuf->NextEntryOffset));
2174
2175                 if (eabuf->EaNameLength >
2176                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2177                         rc = -EINVAL;
2178                         break;
2179                 }
2180
2181                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2182                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2183                        eabuf->EaNameLength);
2184                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2185                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2186
2187                 if (!eabuf->EaValueLength) {
2188                         rc = ksmbd_vfs_casexattr_len(user_ns,
2189                                                      path->dentry,
2190                                                      attr_name,
2191                                                      XATTR_USER_PREFIX_LEN +
2192                                                      eabuf->EaNameLength);
2193
2194                         /* delete the EA only when it exits */
2195                         if (rc > 0) {
2196                                 rc = ksmbd_vfs_remove_xattr(user_ns,
2197                                                             path->dentry,
2198                                                             attr_name);
2199
2200                                 if (rc < 0) {
2201                                         ksmbd_debug(SMB,
2202                                                     "remove xattr failed(%d)\n",
2203                                                     rc);
2204                                         break;
2205                                 }
2206                         }
2207
2208                         /* if the EA doesn't exist, just do nothing. */
2209                         rc = 0;
2210                 } else {
2211                         rc = ksmbd_vfs_setxattr(user_ns,
2212                                                 path->dentry, attr_name, value,
2213                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2214                         if (rc < 0) {
2215                                 ksmbd_debug(SMB,
2216                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2217                                             rc);
2218                                 break;
2219                         }
2220                 }
2221
2222 next:
2223                 next = le32_to_cpu(eabuf->NextEntryOffset);
2224                 if (next == 0 || buf_len < next)
2225                         break;
2226                 buf_len -= next;
2227                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2228                 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2229                         break;
2230
2231         } while (next != 0);
2232
2233         kfree(attr_name);
2234         return rc;
2235 }
2236
2237 static noinline int smb2_set_stream_name_xattr(struct path *path,
2238                                                struct ksmbd_file *fp,
2239                                                char *stream_name, int s_type)
2240 {
2241         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2242         size_t xattr_stream_size;
2243         char *xattr_stream_name;
2244         int rc;
2245
2246         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2247                                          &xattr_stream_name,
2248                                          &xattr_stream_size,
2249                                          s_type);
2250         if (rc)
2251                 return rc;
2252
2253         fp->stream.name = xattr_stream_name;
2254         fp->stream.size = xattr_stream_size;
2255
2256         /* Check if there is stream prefix in xattr space */
2257         rc = ksmbd_vfs_casexattr_len(user_ns,
2258                                      path->dentry,
2259                                      xattr_stream_name,
2260                                      xattr_stream_size);
2261         if (rc >= 0)
2262                 return 0;
2263
2264         if (fp->cdoption == FILE_OPEN_LE) {
2265                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2266                 return -EBADF;
2267         }
2268
2269         rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2270                                 xattr_stream_name, NULL, 0, 0);
2271         if (rc < 0)
2272                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2273         return 0;
2274 }
2275
2276 static int smb2_remove_smb_xattrs(struct path *path)
2277 {
2278         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2279         char *name, *xattr_list = NULL;
2280         ssize_t xattr_list_len;
2281         int err = 0;
2282
2283         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2284         if (xattr_list_len < 0) {
2285                 goto out;
2286         } else if (!xattr_list_len) {
2287                 ksmbd_debug(SMB, "empty xattr in the file\n");
2288                 goto out;
2289         }
2290
2291         for (name = xattr_list; name - xattr_list < xattr_list_len;
2292                         name += strlen(name) + 1) {
2293                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2294
2295                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2296                     strncmp(&name[XATTR_USER_PREFIX_LEN], DOS_ATTRIBUTE_PREFIX,
2297                             DOS_ATTRIBUTE_PREFIX_LEN) &&
2298                     strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN))
2299                         continue;
2300
2301                 err = ksmbd_vfs_remove_xattr(user_ns, path->dentry, name);
2302                 if (err)
2303                         ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
2304         }
2305 out:
2306         kvfree(xattr_list);
2307         return err;
2308 }
2309
2310 static int smb2_create_truncate(struct path *path)
2311 {
2312         int rc = vfs_truncate(path, 0);
2313
2314         if (rc) {
2315                 pr_err("vfs_truncate failed, rc %d\n", rc);
2316                 return rc;
2317         }
2318
2319         rc = smb2_remove_smb_xattrs(path);
2320         if (rc == -EOPNOTSUPP)
2321                 rc = 0;
2322         if (rc)
2323                 ksmbd_debug(SMB,
2324                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2325                             rc);
2326         return rc;
2327 }
2328
2329 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path,
2330                             struct ksmbd_file *fp)
2331 {
2332         struct xattr_dos_attrib da = {0};
2333         int rc;
2334
2335         if (!test_share_config_flag(tcon->share_conf,
2336                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2337                 return;
2338
2339         da.version = 4;
2340         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2341         da.itime = da.create_time = fp->create_time;
2342         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2343                 XATTR_DOSINFO_ITIME;
2344
2345         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2346                                             path->dentry, &da);
2347         if (rc)
2348                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2349 }
2350
2351 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2352                                struct path *path, struct ksmbd_file *fp)
2353 {
2354         struct xattr_dos_attrib da;
2355         int rc;
2356
2357         fp->f_ci->m_fattr &= ~(ATTR_HIDDEN_LE | ATTR_SYSTEM_LE);
2358
2359         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2360         if (!test_share_config_flag(tcon->share_conf,
2361                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2362                 return;
2363
2364         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2365                                             path->dentry, &da);
2366         if (rc > 0) {
2367                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2368                 fp->create_time = da.create_time;
2369                 fp->itime = da.itime;
2370         }
2371 }
2372
2373 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2374                       int open_flags, umode_t posix_mode, bool is_dir)
2375 {
2376         struct ksmbd_tree_connect *tcon = work->tcon;
2377         struct ksmbd_share_config *share = tcon->share_conf;
2378         umode_t mode;
2379         int rc;
2380
2381         if (!(open_flags & O_CREAT))
2382                 return -EBADF;
2383
2384         ksmbd_debug(SMB, "file does not exist, so creating\n");
2385         if (is_dir == true) {
2386                 ksmbd_debug(SMB, "creating directory\n");
2387
2388                 mode = share_config_directory_mode(share, posix_mode);
2389                 rc = ksmbd_vfs_mkdir(work, name, mode);
2390                 if (rc)
2391                         return rc;
2392         } else {
2393                 ksmbd_debug(SMB, "creating regular file\n");
2394
2395                 mode = share_config_create_mode(share, posix_mode);
2396                 rc = ksmbd_vfs_create(work, name, mode);
2397                 if (rc)
2398                         return rc;
2399         }
2400
2401         rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2402         if (rc) {
2403                 pr_err("cannot get linux path (%s), err = %d\n",
2404                        name, rc);
2405                 return rc;
2406         }
2407         return 0;
2408 }
2409
2410 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2411                                  struct smb2_create_req *req,
2412                                  struct path *path)
2413 {
2414         struct create_context *context;
2415         struct create_sd_buf_req *sd_buf;
2416
2417         if (!req->CreateContextsOffset)
2418                 return -ENOENT;
2419
2420         /* Parse SD BUFFER create contexts */
2421         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2422         if (!context)
2423                 return -ENOENT;
2424         else if (IS_ERR(context))
2425                 return PTR_ERR(context);
2426
2427         ksmbd_debug(SMB,
2428                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2429         sd_buf = (struct create_sd_buf_req *)context;
2430         if (le16_to_cpu(context->DataOffset) +
2431             le32_to_cpu(context->DataLength) <
2432             sizeof(struct create_sd_buf_req))
2433                 return -EINVAL;
2434         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2435                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2436 }
2437
2438 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2439                              struct user_namespace *mnt_userns,
2440                              struct inode *inode)
2441 {
2442         fattr->cf_uid = i_uid_into_mnt(mnt_userns, inode);
2443         fattr->cf_gid = i_gid_into_mnt(mnt_userns, inode);
2444         fattr->cf_mode = inode->i_mode;
2445         fattr->cf_acls = NULL;
2446         fattr->cf_dacls = NULL;
2447
2448         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2449                 fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
2450                 if (S_ISDIR(inode->i_mode))
2451                         fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
2452         }
2453 }
2454
2455 /**
2456  * smb2_open() - handler for smb file open request
2457  * @work:       smb work containing request buffer
2458  *
2459  * Return:      0 on success, otherwise error
2460  */
2461 int smb2_open(struct ksmbd_work *work)
2462 {
2463         struct ksmbd_conn *conn = work->conn;
2464         struct ksmbd_session *sess = work->sess;
2465         struct ksmbd_tree_connect *tcon = work->tcon;
2466         struct smb2_create_req *req;
2467         struct smb2_create_rsp *rsp, *rsp_org;
2468         struct path path;
2469         struct ksmbd_share_config *share = tcon->share_conf;
2470         struct ksmbd_file *fp = NULL;
2471         struct file *filp = NULL;
2472         struct user_namespace *user_ns = NULL;
2473         struct kstat stat;
2474         struct create_context *context;
2475         struct lease_ctx_info *lc = NULL;
2476         struct create_ea_buf_req *ea_buf = NULL;
2477         struct oplock_info *opinfo;
2478         __le32 *next_ptr = NULL;
2479         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2480         int rc = 0;
2481         int contxt_cnt = 0, query_disk_id = 0;
2482         int maximal_access_ctxt = 0, posix_ctxt = 0;
2483         int s_type = 0;
2484         int next_off = 0;
2485         char *name = NULL;
2486         char *stream_name = NULL;
2487         bool file_present = false, created = false, already_permitted = false;
2488         int share_ret, need_truncate = 0;
2489         u64 time;
2490         umode_t posix_mode = 0;
2491         __le32 daccess, maximal_access = 0;
2492
2493         rsp_org = work->response_buf;
2494         WORK_BUFFERS(work, req, rsp);
2495
2496         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2497             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2498                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2499                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2500                 smb2_set_err_rsp(work);
2501                 return -EINVAL;
2502         }
2503
2504         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2505                 ksmbd_debug(SMB, "IPC pipe create request\n");
2506                 return create_smb2_pipe(work);
2507         }
2508
2509         if (req->NameLength) {
2510                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2511                     *(char *)req->Buffer == '\\') {
2512                         pr_err("not allow directory name included leading slash\n");
2513                         rc = -EINVAL;
2514                         goto err_out1;
2515                 }
2516
2517                 name = smb2_get_name(share,
2518                                      req->Buffer,
2519                                      le16_to_cpu(req->NameLength),
2520                                      work->conn->local_nls);
2521                 if (IS_ERR(name)) {
2522                         rc = PTR_ERR(name);
2523                         if (rc != -ENOMEM)
2524                                 rc = -ENOENT;
2525                         name = NULL;
2526                         goto err_out1;
2527                 }
2528
2529                 ksmbd_debug(SMB, "converted name = %s\n", name);
2530                 if (strchr(name, ':')) {
2531                         if (!test_share_config_flag(work->tcon->share_conf,
2532                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2533                                 rc = -EBADF;
2534                                 goto err_out1;
2535                         }
2536                         rc = parse_stream_name(name, &stream_name, &s_type);
2537                         if (rc < 0)
2538                                 goto err_out1;
2539                 }
2540
2541                 rc = ksmbd_validate_filename(name);
2542                 if (rc < 0)
2543                         goto err_out1;
2544
2545                 if (ksmbd_share_veto_filename(share, name)) {
2546                         rc = -ENOENT;
2547                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2548                                     name);
2549                         goto err_out1;
2550                 }
2551         } else {
2552                 name = kstrdup("", GFP_KERNEL);
2553                 if (!name) {
2554                         rc = -ENOMEM;
2555                         goto err_out1;
2556                 }
2557         }
2558
2559         req_op_level = req->RequestedOplockLevel;
2560         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2561                 lc = parse_lease_state(req);
2562
2563         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE_LE)) {
2564                 pr_err("Invalid impersonationlevel : 0x%x\n",
2565                        le32_to_cpu(req->ImpersonationLevel));
2566                 rc = -EIO;
2567                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2568                 goto err_out1;
2569         }
2570
2571         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK)) {
2572                 pr_err("Invalid create options : 0x%x\n",
2573                        le32_to_cpu(req->CreateOptions));
2574                 rc = -EINVAL;
2575                 goto err_out1;
2576         } else {
2577                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2578                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2579                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2580
2581                 if (req->CreateOptions &
2582                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2583                      FILE_RESERVE_OPFILTER_LE)) {
2584                         rc = -EOPNOTSUPP;
2585                         goto err_out1;
2586                 }
2587
2588                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2589                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2590                                 rc = -EINVAL;
2591                                 goto err_out1;
2592                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2593                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2594                         }
2595                 }
2596         }
2597
2598         if (le32_to_cpu(req->CreateDisposition) >
2599             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2600                 pr_err("Invalid create disposition : 0x%x\n",
2601                        le32_to_cpu(req->CreateDisposition));
2602                 rc = -EINVAL;
2603                 goto err_out1;
2604         }
2605
2606         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2607                 pr_err("Invalid desired access : 0x%x\n",
2608                        le32_to_cpu(req->DesiredAccess));
2609                 rc = -EACCES;
2610                 goto err_out1;
2611         }
2612
2613         if (req->FileAttributes && !(req->FileAttributes & ATTR_MASK_LE)) {
2614                 pr_err("Invalid file attribute : 0x%x\n",
2615                        le32_to_cpu(req->FileAttributes));
2616                 rc = -EINVAL;
2617                 goto err_out1;
2618         }
2619
2620         if (req->CreateContextsOffset) {
2621                 /* Parse non-durable handle create contexts */
2622                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2623                 if (IS_ERR(context)) {
2624                         rc = PTR_ERR(context);
2625                         goto err_out1;
2626                 } else if (context) {
2627                         ea_buf = (struct create_ea_buf_req *)context;
2628                         if (le16_to_cpu(context->DataOffset) +
2629                             le32_to_cpu(context->DataLength) <
2630                             sizeof(struct create_ea_buf_req)) {
2631                                 rc = -EINVAL;
2632                                 goto err_out1;
2633                         }
2634                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2635                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2636                                 rc = -EACCES;
2637                                 goto err_out1;
2638                         }
2639                 }
2640
2641                 context = smb2_find_context_vals(req,
2642                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2643                 if (IS_ERR(context)) {
2644                         rc = PTR_ERR(context);
2645                         goto err_out1;
2646                 } else if (context) {
2647                         ksmbd_debug(SMB,
2648                                     "get query maximal access context\n");
2649                         maximal_access_ctxt = 1;
2650                 }
2651
2652                 context = smb2_find_context_vals(req,
2653                                                  SMB2_CREATE_TIMEWARP_REQUEST);
2654                 if (IS_ERR(context)) {
2655                         rc = PTR_ERR(context);
2656                         goto err_out1;
2657                 } else if (context) {
2658                         ksmbd_debug(SMB, "get timewarp context\n");
2659                         rc = -EBADF;
2660                         goto err_out1;
2661                 }
2662
2663                 if (tcon->posix_extensions) {
2664                         context = smb2_find_context_vals(req,
2665                                                          SMB2_CREATE_TAG_POSIX);
2666                         if (IS_ERR(context)) {
2667                                 rc = PTR_ERR(context);
2668                                 goto err_out1;
2669                         } else if (context) {
2670                                 struct create_posix *posix =
2671                                         (struct create_posix *)context;
2672                                 if (le16_to_cpu(context->DataOffset) +
2673                                     le32_to_cpu(context->DataLength) <
2674                                     sizeof(struct create_posix)) {
2675                                         rc = -EINVAL;
2676                                         goto err_out1;
2677                                 }
2678                                 ksmbd_debug(SMB, "get posix context\n");
2679
2680                                 posix_mode = le32_to_cpu(posix->Mode);
2681                                 posix_ctxt = 1;
2682                         }
2683                 }
2684         }
2685
2686         if (ksmbd_override_fsids(work)) {
2687                 rc = -ENOMEM;
2688                 goto err_out1;
2689         }
2690
2691         rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2692         if (!rc) {
2693                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2694                         /*
2695                          * If file exists with under flags, return access
2696                          * denied error.
2697                          */
2698                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2699                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2700                                 rc = -EACCES;
2701                                 path_put(&path);
2702                                 goto err_out;
2703                         }
2704
2705                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2706                                 ksmbd_debug(SMB,
2707                                             "User does not have write permission\n");
2708                                 rc = -EACCES;
2709                                 path_put(&path);
2710                                 goto err_out;
2711                         }
2712                 } else if (d_is_symlink(path.dentry)) {
2713                         rc = -EACCES;
2714                         path_put(&path);
2715                         goto err_out;
2716                 }
2717         }
2718
2719         if (rc) {
2720                 if (rc != -ENOENT)
2721                         goto err_out;
2722                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2723                             name, rc);
2724                 rc = 0;
2725         } else {
2726                 file_present = true;
2727                 user_ns = mnt_user_ns(path.mnt);
2728                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
2729         }
2730         if (stream_name) {
2731                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2732                         if (s_type == DATA_STREAM) {
2733                                 rc = -EIO;
2734                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2735                         }
2736                 } else {
2737                         if (S_ISDIR(stat.mode) && s_type == DATA_STREAM) {
2738                                 rc = -EIO;
2739                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2740                         }
2741                 }
2742
2743                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2744                     req->FileAttributes & ATTR_NORMAL_LE) {
2745                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2746                         rc = -EIO;
2747                 }
2748
2749                 if (rc < 0)
2750                         goto err_out;
2751         }
2752
2753         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2754             S_ISDIR(stat.mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2755                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2756                             name, req->CreateOptions);
2757                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2758                 rc = -EIO;
2759                 goto err_out;
2760         }
2761
2762         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2763             !(req->CreateDisposition == FILE_CREATE_LE) &&
2764             !S_ISDIR(stat.mode)) {
2765                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2766                 rc = -EIO;
2767                 goto err_out;
2768         }
2769
2770         if (!stream_name && file_present &&
2771             req->CreateDisposition == FILE_CREATE_LE) {
2772                 rc = -EEXIST;
2773                 goto err_out;
2774         }
2775
2776         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2777
2778         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2779                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2780                                          sess->user->uid);
2781                 if (rc)
2782                         goto err_out;
2783         }
2784
2785         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2786                 if (!file_present) {
2787                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2788                 } else {
2789                         rc = ksmbd_vfs_query_maximal_access(user_ns,
2790                                                             path.dentry,
2791                                                             &daccess);
2792                         if (rc)
2793                                 goto err_out;
2794                         already_permitted = true;
2795                 }
2796                 maximal_access = daccess;
2797         }
2798
2799         open_flags = smb2_create_open_flags(file_present, daccess,
2800                                             req->CreateDisposition,
2801                                             &may_flags);
2802
2803         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2804                 if (open_flags & O_CREAT) {
2805                         ksmbd_debug(SMB,
2806                                     "User does not have write permission\n");
2807                         rc = -EACCES;
2808                         goto err_out;
2809                 }
2810         }
2811
2812         /*create file if not present */
2813         if (!file_present) {
2814                 rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2815                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2816                 if (rc) {
2817                         if (rc == -ENOENT) {
2818                                 rc = -EIO;
2819                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2820                         }
2821                         goto err_out;
2822                 }
2823
2824                 created = true;
2825                 user_ns = mnt_user_ns(path.mnt);
2826                 if (ea_buf) {
2827                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2828                             sizeof(struct smb2_ea_info)) {
2829                                 rc = -EINVAL;
2830                                 goto err_out;
2831                         }
2832
2833                         rc = smb2_set_ea(&ea_buf->ea,
2834                                          le32_to_cpu(ea_buf->ccontext.DataLength),
2835                                          &path);
2836                         if (rc == -EOPNOTSUPP)
2837                                 rc = 0;
2838                         else if (rc)
2839                                 goto err_out;
2840                 }
2841         } else if (!already_permitted) {
2842                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2843                  * because execute(search) permission on a parent directory,
2844                  * is already granted.
2845                  */
2846                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2847                         rc = inode_permission(user_ns,
2848                                               d_inode(path.dentry),
2849                                               may_flags);
2850                         if (rc)
2851                                 goto err_out;
2852
2853                         if ((daccess & FILE_DELETE_LE) ||
2854                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2855                                 rc = ksmbd_vfs_may_delete(user_ns,
2856                                                           path.dentry);
2857                                 if (rc)
2858                                         goto err_out;
2859                         }
2860                 }
2861         }
2862
2863         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2864         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2865                 rc = -EBUSY;
2866                 goto err_out;
2867         }
2868
2869         rc = 0;
2870         filp = dentry_open(&path, open_flags, current_cred());
2871         if (IS_ERR(filp)) {
2872                 rc = PTR_ERR(filp);
2873                 pr_err("dentry open for dir failed, rc %d\n", rc);
2874                 goto err_out;
2875         }
2876
2877         if (file_present) {
2878                 if (!(open_flags & O_TRUNC))
2879                         file_info = FILE_OPENED;
2880                 else
2881                         file_info = FILE_OVERWRITTEN;
2882
2883                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2884                     FILE_SUPERSEDE_LE)
2885                         file_info = FILE_SUPERSEDED;
2886         } else if (open_flags & O_CREAT) {
2887                 file_info = FILE_CREATED;
2888         }
2889
2890         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2891
2892         /* Obtain Volatile-ID */
2893         fp = ksmbd_open_fd(work, filp);
2894         if (IS_ERR(fp)) {
2895                 fput(filp);
2896                 rc = PTR_ERR(fp);
2897                 fp = NULL;
2898                 goto err_out;
2899         }
2900
2901         /* Get Persistent-ID */
2902         ksmbd_open_durable_fd(fp);
2903         if (!has_file_id(fp->persistent_id)) {
2904                 rc = -ENOMEM;
2905                 goto err_out;
2906         }
2907
2908         fp->filename = name;
2909         fp->cdoption = req->CreateDisposition;
2910         fp->daccess = daccess;
2911         fp->saccess = req->ShareAccess;
2912         fp->coption = req->CreateOptions;
2913
2914         /* Set default windows and posix acls if creating new file */
2915         if (created) {
2916                 int posix_acl_rc;
2917                 struct inode *inode = d_inode(path.dentry);
2918
2919                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2920                                                            inode,
2921                                                            d_inode(path.dentry->d_parent));
2922                 if (posix_acl_rc)
2923                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2924
2925                 if (test_share_config_flag(work->tcon->share_conf,
2926                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2927                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2928                                               sess->user->gid);
2929                 }
2930
2931                 if (rc) {
2932                         rc = smb2_create_sd_buffer(work, req, &path);
2933                         if (rc) {
2934                                 if (posix_acl_rc)
2935                                         ksmbd_vfs_set_init_posix_acl(user_ns,
2936                                                                      inode);
2937
2938                                 if (test_share_config_flag(work->tcon->share_conf,
2939                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2940                                         struct smb_fattr fattr;
2941                                         struct smb_ntsd *pntsd;
2942                                         int pntsd_size, ace_num = 0;
2943
2944                                         ksmbd_acls_fattr(&fattr, user_ns, inode);
2945                                         if (fattr.cf_acls)
2946                                                 ace_num = fattr.cf_acls->a_count;
2947                                         if (fattr.cf_dacls)
2948                                                 ace_num += fattr.cf_dacls->a_count;
2949
2950                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
2951                                                         sizeof(struct smb_sid) * 3 +
2952                                                         sizeof(struct smb_acl) +
2953                                                         sizeof(struct smb_ace) * ace_num * 2,
2954                                                         GFP_KERNEL);
2955                                         if (!pntsd)
2956                                                 goto err_out;
2957
2958                                         rc = build_sec_desc(user_ns,
2959                                                             pntsd, NULL,
2960                                                             OWNER_SECINFO |
2961                                                             GROUP_SECINFO |
2962                                                             DACL_SECINFO,
2963                                                             &pntsd_size, &fattr);
2964                                         posix_acl_release(fattr.cf_acls);
2965                                         posix_acl_release(fattr.cf_dacls);
2966
2967                                         rc = ksmbd_vfs_set_sd_xattr(conn,
2968                                                                     user_ns,
2969                                                                     path.dentry,
2970                                                                     pntsd,
2971                                                                     pntsd_size);
2972                                         kfree(pntsd);
2973                                         if (rc)
2974                                                 pr_err("failed to store ntacl in xattr : %d\n",
2975                                                        rc);
2976                                 }
2977                         }
2978                 }
2979                 rc = 0;
2980         }
2981
2982         if (stream_name) {
2983                 rc = smb2_set_stream_name_xattr(&path,
2984                                                 fp,
2985                                                 stream_name,
2986                                                 s_type);
2987                 if (rc)
2988                         goto err_out;
2989                 file_info = FILE_CREATED;
2990         }
2991
2992         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
2993                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
2994         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
2995             !fp->attrib_only && !stream_name) {
2996                 smb_break_all_oplock(work, fp);
2997                 need_truncate = 1;
2998         }
2999
3000         /* fp should be searchable through ksmbd_inode.m_fp_list
3001          * after daccess, saccess, attrib_only, and stream are
3002          * initialized.
3003          */
3004         write_lock(&fp->f_ci->m_lock);
3005         list_add(&fp->node, &fp->f_ci->m_fp_list);
3006         write_unlock(&fp->f_ci->m_lock);
3007
3008         rc = ksmbd_vfs_getattr(&path, &stat);
3009         if (rc) {
3010                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
3011                 rc = 0;
3012         }
3013
3014         /* Check delete pending among previous fp before oplock break */
3015         if (ksmbd_inode_pending_delete(fp)) {
3016                 rc = -EBUSY;
3017                 goto err_out;
3018         }
3019
3020         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3021         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3022             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3023              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3024                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3025                         rc = share_ret;
3026                         goto err_out;
3027                 }
3028         } else {
3029                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3030                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3031                         ksmbd_debug(SMB,
3032                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3033                                     name, req_op_level, lc->req_state);
3034                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3035                         if (rc)
3036                                 goto err_out;
3037                 } else if (open_flags == O_RDONLY &&
3038                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3039                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3040                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3041
3042                 rc = smb_grant_oplock(work, req_op_level,
3043                                       fp->persistent_id, fp,
3044                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3045                                       lc, share_ret);
3046                 if (rc < 0)
3047                         goto err_out;
3048         }
3049
3050         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3051                 ksmbd_fd_set_delete_on_close(fp, file_info);
3052
3053         if (need_truncate) {
3054                 rc = smb2_create_truncate(&path);
3055                 if (rc)
3056                         goto err_out;
3057         }
3058
3059         if (req->CreateContextsOffset) {
3060                 struct create_alloc_size_req *az_req;
3061
3062                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3063                                         SMB2_CREATE_ALLOCATION_SIZE);
3064                 if (IS_ERR(az_req)) {
3065                         rc = PTR_ERR(az_req);
3066                         goto err_out;
3067                 } else if (az_req) {
3068                         loff_t alloc_size;
3069                         int err;
3070
3071                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3072                             le32_to_cpu(az_req->ccontext.DataLength) <
3073                             sizeof(struct create_alloc_size_req)) {
3074                                 rc = -EINVAL;
3075                                 goto err_out;
3076                         }
3077                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3078                         ksmbd_debug(SMB,
3079                                     "request smb2 create allocate size : %llu\n",
3080                                     alloc_size);
3081                         smb_break_all_levII_oplock(work, fp, 1);
3082                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3083                                             alloc_size);
3084                         if (err < 0)
3085                                 ksmbd_debug(SMB,
3086                                             "vfs_fallocate is failed : %d\n",
3087                                             err);
3088                 }
3089
3090                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3091                 if (IS_ERR(context)) {
3092                         rc = PTR_ERR(context);
3093                         goto err_out;
3094                 } else if (context) {
3095                         ksmbd_debug(SMB, "get query on disk id context\n");
3096                         query_disk_id = 1;
3097                 }
3098         }
3099
3100         if (stat.result_mask & STATX_BTIME)
3101                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3102         else
3103                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3104         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3105                 fp->f_ci->m_fattr =
3106                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3107
3108         if (!created)
3109                 smb2_update_xattrs(tcon, &path, fp);
3110         else
3111                 smb2_new_xattrs(tcon, &path, fp);
3112
3113         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3114
3115         generic_fillattr(user_ns, file_inode(fp->filp),
3116                          &stat);
3117
3118         rsp->StructureSize = cpu_to_le16(89);
3119         rcu_read_lock();
3120         opinfo = rcu_dereference(fp->f_opinfo);
3121         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3122         rcu_read_unlock();
3123         rsp->Reserved = 0;
3124         rsp->CreateAction = cpu_to_le32(file_info);
3125         rsp->CreationTime = cpu_to_le64(fp->create_time);
3126         time = ksmbd_UnixTimeToNT(stat.atime);
3127         rsp->LastAccessTime = cpu_to_le64(time);
3128         time = ksmbd_UnixTimeToNT(stat.mtime);
3129         rsp->LastWriteTime = cpu_to_le64(time);
3130         time = ksmbd_UnixTimeToNT(stat.ctime);
3131         rsp->ChangeTime = cpu_to_le64(time);
3132         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3133                 cpu_to_le64(stat.blocks << 9);
3134         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3135         rsp->FileAttributes = fp->f_ci->m_fattr;
3136
3137         rsp->Reserved2 = 0;
3138
3139         rsp->PersistentFileId = cpu_to_le64(fp->persistent_id);
3140         rsp->VolatileFileId = cpu_to_le64(fp->volatile_id);
3141
3142         rsp->CreateContextsOffset = 0;
3143         rsp->CreateContextsLength = 0;
3144         inc_rfc1001_len(rsp_org, 88); /* StructureSize - 1*/
3145
3146         /* If lease is request send lease context response */
3147         if (opinfo && opinfo->is_lease) {
3148                 struct create_context *lease_ccontext;
3149
3150                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3151                             name, opinfo->o_lease->state);
3152                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3153
3154                 lease_ccontext = (struct create_context *)rsp->Buffer;
3155                 contxt_cnt++;
3156                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3157                 le32_add_cpu(&rsp->CreateContextsLength,
3158                              conn->vals->create_lease_size);
3159                 inc_rfc1001_len(rsp_org, conn->vals->create_lease_size);
3160                 next_ptr = &lease_ccontext->Next;
3161                 next_off = conn->vals->create_lease_size;
3162         }
3163
3164         if (maximal_access_ctxt) {
3165                 struct create_context *mxac_ccontext;
3166
3167                 if (maximal_access == 0)
3168                         ksmbd_vfs_query_maximal_access(user_ns,
3169                                                        path.dentry,
3170                                                        &maximal_access);
3171                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3172                                 le32_to_cpu(rsp->CreateContextsLength));
3173                 contxt_cnt++;
3174                 create_mxac_rsp_buf(rsp->Buffer +
3175                                 le32_to_cpu(rsp->CreateContextsLength),
3176                                 le32_to_cpu(maximal_access));
3177                 le32_add_cpu(&rsp->CreateContextsLength,
3178                              conn->vals->create_mxac_size);
3179                 inc_rfc1001_len(rsp_org, conn->vals->create_mxac_size);
3180                 if (next_ptr)
3181                         *next_ptr = cpu_to_le32(next_off);
3182                 next_ptr = &mxac_ccontext->Next;
3183                 next_off = conn->vals->create_mxac_size;
3184         }
3185
3186         if (query_disk_id) {
3187                 struct create_context *disk_id_ccontext;
3188
3189                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3190                                 le32_to_cpu(rsp->CreateContextsLength));
3191                 contxt_cnt++;
3192                 create_disk_id_rsp_buf(rsp->Buffer +
3193                                 le32_to_cpu(rsp->CreateContextsLength),
3194                                 stat.ino, tcon->id);
3195                 le32_add_cpu(&rsp->CreateContextsLength,
3196                              conn->vals->create_disk_id_size);
3197                 inc_rfc1001_len(rsp_org, conn->vals->create_disk_id_size);
3198                 if (next_ptr)
3199                         *next_ptr = cpu_to_le32(next_off);
3200                 next_ptr = &disk_id_ccontext->Next;
3201                 next_off = conn->vals->create_disk_id_size;
3202         }
3203
3204         if (posix_ctxt) {
3205                 contxt_cnt++;
3206                 create_posix_rsp_buf(rsp->Buffer +
3207                                 le32_to_cpu(rsp->CreateContextsLength),
3208                                 fp);
3209                 le32_add_cpu(&rsp->CreateContextsLength,
3210                              conn->vals->create_posix_size);
3211                 inc_rfc1001_len(rsp_org, conn->vals->create_posix_size);
3212                 if (next_ptr)
3213                         *next_ptr = cpu_to_le32(next_off);
3214         }
3215
3216         if (contxt_cnt > 0) {
3217                 rsp->CreateContextsOffset =
3218                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)
3219                         - 4);
3220         }
3221
3222 err_out:
3223         if (file_present || created)
3224                 path_put(&path);
3225         ksmbd_revert_fsids(work);
3226 err_out1:
3227         if (rc) {
3228                 if (rc == -EINVAL)
3229                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3230                 else if (rc == -EOPNOTSUPP)
3231                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3232                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3233                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3234                 else if (rc == -ENOENT)
3235                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3236                 else if (rc == -EPERM)
3237                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3238                 else if (rc == -EBUSY)
3239                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3240                 else if (rc == -EBADF)
3241                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3242                 else if (rc == -ENOEXEC)
3243                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3244                 else if (rc == -ENXIO)
3245                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3246                 else if (rc == -EEXIST)
3247                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3248                 else if (rc == -EMFILE)
3249                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3250                 if (!rsp->hdr.Status)
3251                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3252
3253                 if (!fp || !fp->filename)
3254                         kfree(name);
3255                 if (fp)
3256                         ksmbd_fd_put(work, fp);
3257                 smb2_set_err_rsp(work);
3258                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3259         }
3260
3261         kfree(lc);
3262
3263         return 0;
3264 }
3265
3266 static int readdir_info_level_struct_sz(int info_level)
3267 {
3268         switch (info_level) {
3269         case FILE_FULL_DIRECTORY_INFORMATION:
3270                 return sizeof(struct file_full_directory_info);
3271         case FILE_BOTH_DIRECTORY_INFORMATION:
3272                 return sizeof(struct file_both_directory_info);
3273         case FILE_DIRECTORY_INFORMATION:
3274                 return sizeof(struct file_directory_info);
3275         case FILE_NAMES_INFORMATION:
3276                 return sizeof(struct file_names_info);
3277         case FILEID_FULL_DIRECTORY_INFORMATION:
3278                 return sizeof(struct file_id_full_dir_info);
3279         case FILEID_BOTH_DIRECTORY_INFORMATION:
3280                 return sizeof(struct file_id_both_directory_info);
3281         case SMB_FIND_FILE_POSIX_INFO:
3282                 return sizeof(struct smb2_posix_info);
3283         default:
3284                 return -EOPNOTSUPP;
3285         }
3286 }
3287
3288 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3289 {
3290         switch (info_level) {
3291         case FILE_FULL_DIRECTORY_INFORMATION:
3292         {
3293                 struct file_full_directory_info *ffdinfo;
3294
3295                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3296                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3297                 d_info->name = ffdinfo->FileName;
3298                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3299                 return 0;
3300         }
3301         case FILE_BOTH_DIRECTORY_INFORMATION:
3302         {
3303                 struct file_both_directory_info *fbdinfo;
3304
3305                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3306                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3307                 d_info->name = fbdinfo->FileName;
3308                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3309                 return 0;
3310         }
3311         case FILE_DIRECTORY_INFORMATION:
3312         {
3313                 struct file_directory_info *fdinfo;
3314
3315                 fdinfo = (struct file_directory_info *)d_info->rptr;
3316                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3317                 d_info->name = fdinfo->FileName;
3318                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3319                 return 0;
3320         }
3321         case FILE_NAMES_INFORMATION:
3322         {
3323                 struct file_names_info *fninfo;
3324
3325                 fninfo = (struct file_names_info *)d_info->rptr;
3326                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3327                 d_info->name = fninfo->FileName;
3328                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3329                 return 0;
3330         }
3331         case FILEID_FULL_DIRECTORY_INFORMATION:
3332         {
3333                 struct file_id_full_dir_info *dinfo;
3334
3335                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3336                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3337                 d_info->name = dinfo->FileName;
3338                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3339                 return 0;
3340         }
3341         case FILEID_BOTH_DIRECTORY_INFORMATION:
3342         {
3343                 struct file_id_both_directory_info *fibdinfo;
3344
3345                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3346                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3347                 d_info->name = fibdinfo->FileName;
3348                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3349                 return 0;
3350         }
3351         case SMB_FIND_FILE_POSIX_INFO:
3352         {
3353                 struct smb2_posix_info *posix_info;
3354
3355                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3356                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3357                 d_info->name = posix_info->name;
3358                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3359                 return 0;
3360         }
3361         default:
3362                 return -EINVAL;
3363         }
3364 }
3365
3366 /**
3367  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3368  * buffer
3369  * @conn:       connection instance
3370  * @info_level: smb information level
3371  * @d_info:     structure included variables for query dir
3372  * @user_ns:    user namespace
3373  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3374  *
3375  * if directory has many entries, find first can't read it fully.
3376  * find next might be called multiple times to read remaining dir entries
3377  *
3378  * Return:      0 on success, otherwise error
3379  */
3380 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3381                                        struct ksmbd_dir_info *d_info,
3382                                        struct ksmbd_kstat *ksmbd_kstat)
3383 {
3384         int next_entry_offset = 0;
3385         char *conv_name;
3386         int conv_len;
3387         void *kstat;
3388         int struct_sz, rc = 0;
3389
3390         conv_name = ksmbd_convert_dir_info_name(d_info,
3391                                                 conn->local_nls,
3392                                                 &conv_len);
3393         if (!conv_name)
3394                 return -ENOMEM;
3395
3396         /* Somehow the name has only terminating NULL bytes */
3397         if (conv_len < 0) {
3398                 rc = -EINVAL;
3399                 goto free_conv_name;
3400         }
3401
3402         struct_sz = readdir_info_level_struct_sz(info_level);
3403         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3404                                   KSMBD_DIR_INFO_ALIGNMENT);
3405
3406         if (next_entry_offset > d_info->out_buf_len) {
3407                 d_info->out_buf_len = 0;
3408                 rc = -ENOSPC;
3409                 goto free_conv_name;
3410         }
3411
3412         kstat = d_info->wptr;
3413         if (info_level != FILE_NAMES_INFORMATION)
3414                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3415
3416         switch (info_level) {
3417         case FILE_FULL_DIRECTORY_INFORMATION:
3418         {
3419                 struct file_full_directory_info *ffdinfo;
3420
3421                 ffdinfo = (struct file_full_directory_info *)kstat;
3422                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3423                 ffdinfo->EaSize =
3424                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3425                 if (ffdinfo->EaSize)
3426                         ffdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3427                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3428                         ffdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3429                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3430                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3431                 break;
3432         }
3433         case FILE_BOTH_DIRECTORY_INFORMATION:
3434         {
3435                 struct file_both_directory_info *fbdinfo;
3436
3437                 fbdinfo = (struct file_both_directory_info *)kstat;
3438                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3439                 fbdinfo->EaSize =
3440                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3441                 if (fbdinfo->EaSize)
3442                         fbdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3443                 fbdinfo->ShortNameLength = 0;
3444                 fbdinfo->Reserved = 0;
3445                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3446                         fbdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3447                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3448                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3449                 break;
3450         }
3451         case FILE_DIRECTORY_INFORMATION:
3452         {
3453                 struct file_directory_info *fdinfo;
3454
3455                 fdinfo = (struct file_directory_info *)kstat;
3456                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3457                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3458                         fdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3459                 memcpy(fdinfo->FileName, conv_name, conv_len);
3460                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3461                 break;
3462         }
3463         case FILE_NAMES_INFORMATION:
3464         {
3465                 struct file_names_info *fninfo;
3466
3467                 fninfo = (struct file_names_info *)kstat;
3468                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3469                 memcpy(fninfo->FileName, conv_name, conv_len);
3470                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3471                 break;
3472         }
3473         case FILEID_FULL_DIRECTORY_INFORMATION:
3474         {
3475                 struct file_id_full_dir_info *dinfo;
3476
3477                 dinfo = (struct file_id_full_dir_info *)kstat;
3478                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3479                 dinfo->EaSize =
3480                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3481                 if (dinfo->EaSize)
3482                         dinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3483                 dinfo->Reserved = 0;
3484                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3485                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3486                         dinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3487                 memcpy(dinfo->FileName, conv_name, conv_len);
3488                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3489                 break;
3490         }
3491         case FILEID_BOTH_DIRECTORY_INFORMATION:
3492         {
3493                 struct file_id_both_directory_info *fibdinfo;
3494
3495                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3496                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3497                 fibdinfo->EaSize =
3498                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3499                 if (fibdinfo->EaSize)
3500                         fibdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3501                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3502                 fibdinfo->ShortNameLength = 0;
3503                 fibdinfo->Reserved = 0;
3504                 fibdinfo->Reserved2 = cpu_to_le16(0);
3505                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3506                         fibdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3507                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3508                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3509                 break;
3510         }
3511         case SMB_FIND_FILE_POSIX_INFO:
3512         {
3513                 struct smb2_posix_info *posix_info;
3514                 u64 time;
3515
3516                 posix_info = (struct smb2_posix_info *)kstat;
3517                 posix_info->Ignored = 0;
3518                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3519                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3520                 posix_info->ChangeTime = cpu_to_le64(time);
3521                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3522                 posix_info->LastAccessTime = cpu_to_le64(time);
3523                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3524                 posix_info->LastWriteTime = cpu_to_le64(time);
3525                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3526                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3527                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3528                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3529                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode);
3530                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3531                 posix_info->DosAttributes =
3532                         S_ISDIR(ksmbd_kstat->kstat->mode) ? ATTR_DIRECTORY_LE : ATTR_ARCHIVE_LE;
3533                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3534                         posix_info->DosAttributes |= ATTR_HIDDEN_LE;
3535                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3536                           SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3537                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3538                           SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);
3539                 memcpy(posix_info->name, conv_name, conv_len);
3540                 posix_info->name_len = cpu_to_le32(conv_len);
3541                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3542                 break;
3543         }
3544
3545         } /* switch (info_level) */
3546
3547         d_info->last_entry_offset = d_info->data_count;
3548         d_info->data_count += next_entry_offset;
3549         d_info->out_buf_len -= next_entry_offset;
3550         d_info->wptr += next_entry_offset;
3551
3552         ksmbd_debug(SMB,
3553                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3554                     info_level, d_info->out_buf_len,
3555                     next_entry_offset, d_info->data_count);
3556
3557 free_conv_name:
3558         kfree(conv_name);
3559         return rc;
3560 }
3561
3562 struct smb2_query_dir_private {
3563         struct ksmbd_work       *work;
3564         char                    *search_pattern;
3565         struct ksmbd_file       *dir_fp;
3566
3567         struct ksmbd_dir_info   *d_info;
3568         int                     info_level;
3569 };
3570
3571 static void lock_dir(struct ksmbd_file *dir_fp)
3572 {
3573         struct dentry *dir = dir_fp->filp->f_path.dentry;
3574
3575         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3576 }
3577
3578 static void unlock_dir(struct ksmbd_file *dir_fp)
3579 {
3580         struct dentry *dir = dir_fp->filp->f_path.dentry;
3581
3582         inode_unlock(d_inode(dir));
3583 }
3584
3585 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3586 {
3587         struct user_namespace   *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3588         struct kstat            kstat;
3589         struct ksmbd_kstat      ksmbd_kstat;
3590         int                     rc;
3591         int                     i;
3592
3593         for (i = 0; i < priv->d_info->num_entry; i++) {
3594                 struct dentry *dent;
3595
3596                 if (dentry_name(priv->d_info, priv->info_level))
3597                         return -EINVAL;
3598
3599                 lock_dir(priv->dir_fp);
3600                 dent = lookup_one(user_ns, priv->d_info->name,
3601                                   priv->dir_fp->filp->f_path.dentry,
3602                                   priv->d_info->name_len);
3603                 unlock_dir(priv->dir_fp);
3604
3605                 if (IS_ERR(dent)) {
3606                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3607                                     priv->d_info->name,
3608                                     PTR_ERR(dent));
3609                         continue;
3610                 }
3611                 if (unlikely(d_is_negative(dent))) {
3612                         dput(dent);
3613                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3614                                     priv->d_info->name);
3615                         continue;
3616                 }
3617
3618                 ksmbd_kstat.kstat = &kstat;
3619                 if (priv->info_level != FILE_NAMES_INFORMATION)
3620                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3621                                                     user_ns,
3622                                                     dent,
3623                                                     &ksmbd_kstat);
3624
3625                 rc = smb2_populate_readdir_entry(priv->work->conn,
3626                                                  priv->info_level,
3627                                                  priv->d_info,
3628                                                  &ksmbd_kstat);
3629                 dput(dent);
3630                 if (rc)
3631                         return rc;
3632         }
3633         return 0;
3634 }
3635
3636 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3637                                    int info_level)
3638 {
3639         int struct_sz;
3640         int conv_len;
3641         int next_entry_offset;
3642
3643         struct_sz = readdir_info_level_struct_sz(info_level);
3644         if (struct_sz == -EOPNOTSUPP)
3645                 return -EOPNOTSUPP;
3646
3647         conv_len = (d_info->name_len + 1) * 2;
3648         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3649                                   KSMBD_DIR_INFO_ALIGNMENT);
3650
3651         if (next_entry_offset > d_info->out_buf_len) {
3652                 d_info->out_buf_len = 0;
3653                 return -ENOSPC;
3654         }
3655
3656         switch (info_level) {
3657         case FILE_FULL_DIRECTORY_INFORMATION:
3658         {
3659                 struct file_full_directory_info *ffdinfo;
3660
3661                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3662                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3663                 ffdinfo->FileName[d_info->name_len] = 0x00;
3664                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3665                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3666                 break;
3667         }
3668         case FILE_BOTH_DIRECTORY_INFORMATION:
3669         {
3670                 struct file_both_directory_info *fbdinfo;
3671
3672                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3673                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3674                 fbdinfo->FileName[d_info->name_len] = 0x00;
3675                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3676                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3677                 break;
3678         }
3679         case FILE_DIRECTORY_INFORMATION:
3680         {
3681                 struct file_directory_info *fdinfo;
3682
3683                 fdinfo = (struct file_directory_info *)d_info->wptr;
3684                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3685                 fdinfo->FileName[d_info->name_len] = 0x00;
3686                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3687                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3688                 break;
3689         }
3690         case FILE_NAMES_INFORMATION:
3691         {
3692                 struct file_names_info *fninfo;
3693
3694                 fninfo = (struct file_names_info *)d_info->wptr;
3695                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3696                 fninfo->FileName[d_info->name_len] = 0x00;
3697                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3698                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3699                 break;
3700         }
3701         case FILEID_FULL_DIRECTORY_INFORMATION:
3702         {
3703                 struct file_id_full_dir_info *dinfo;
3704
3705                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3706                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3707                 dinfo->FileName[d_info->name_len] = 0x00;
3708                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3709                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3710                 break;
3711         }
3712         case FILEID_BOTH_DIRECTORY_INFORMATION:
3713         {
3714                 struct file_id_both_directory_info *fibdinfo;
3715
3716                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3717                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3718                 fibdinfo->FileName[d_info->name_len] = 0x00;
3719                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3720                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3721                 break;
3722         }
3723         case SMB_FIND_FILE_POSIX_INFO:
3724         {
3725                 struct smb2_posix_info *posix_info;
3726
3727                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3728                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3729                 posix_info->name[d_info->name_len] = 0x00;
3730                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3731                 posix_info->NextEntryOffset =
3732                         cpu_to_le32(next_entry_offset);
3733                 break;
3734         }
3735         } /* switch (info_level) */
3736
3737         d_info->num_entry++;
3738         d_info->out_buf_len -= next_entry_offset;
3739         d_info->wptr += next_entry_offset;
3740         return 0;
3741 }
3742
3743 static int __query_dir(struct dir_context *ctx, const char *name, int namlen,
3744                        loff_t offset, u64 ino, unsigned int d_type)
3745 {
3746         struct ksmbd_readdir_data       *buf;
3747         struct smb2_query_dir_private   *priv;
3748         struct ksmbd_dir_info           *d_info;
3749         int                             rc;
3750
3751         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3752         priv    = buf->private;
3753         d_info  = priv->d_info;
3754
3755         /* dot and dotdot entries are already reserved */
3756         if (!strcmp(".", name) || !strcmp("..", name))
3757                 return 0;
3758         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3759                 return 0;
3760         if (!match_pattern(name, namlen, priv->search_pattern))
3761                 return 0;
3762
3763         d_info->name            = name;
3764         d_info->name_len        = namlen;
3765         rc = reserve_populate_dentry(d_info, priv->info_level);
3766         if (rc)
3767                 return rc;
3768         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) {
3769                 d_info->out_buf_len = 0;
3770                 return 0;
3771         }
3772         return 0;
3773 }
3774
3775 static void restart_ctx(struct dir_context *ctx)
3776 {
3777         ctx->pos = 0;
3778 }
3779
3780 static int verify_info_level(int info_level)
3781 {
3782         switch (info_level) {
3783         case FILE_FULL_DIRECTORY_INFORMATION:
3784         case FILE_BOTH_DIRECTORY_INFORMATION:
3785         case FILE_DIRECTORY_INFORMATION:
3786         case FILE_NAMES_INFORMATION:
3787         case FILEID_FULL_DIRECTORY_INFORMATION:
3788         case FILEID_BOTH_DIRECTORY_INFORMATION:
3789         case SMB_FIND_FILE_POSIX_INFO:
3790                 break;
3791         default:
3792                 return -EOPNOTSUPP;
3793         }
3794
3795         return 0;
3796 }
3797
3798 int smb2_query_dir(struct ksmbd_work *work)
3799 {
3800         struct ksmbd_conn *conn = work->conn;
3801         struct smb2_query_directory_req *req;
3802         struct smb2_query_directory_rsp *rsp, *rsp_org;
3803         struct ksmbd_share_config *share = work->tcon->share_conf;
3804         struct ksmbd_file *dir_fp = NULL;
3805         struct ksmbd_dir_info d_info;
3806         int rc = 0;
3807         char *srch_ptr = NULL;
3808         unsigned char srch_flag;
3809         int buffer_sz;
3810         struct smb2_query_dir_private query_dir_private = {NULL, };
3811
3812         rsp_org = work->response_buf;
3813         WORK_BUFFERS(work, req, rsp);
3814
3815         if (ksmbd_override_fsids(work)) {
3816                 rsp->hdr.Status = STATUS_NO_MEMORY;
3817                 smb2_set_err_rsp(work);
3818                 return -ENOMEM;
3819         }
3820
3821         rc = verify_info_level(req->FileInformationClass);
3822         if (rc) {
3823                 rc = -EFAULT;
3824                 goto err_out2;
3825         }
3826
3827         dir_fp = ksmbd_lookup_fd_slow(work,
3828                                       le64_to_cpu(req->VolatileFileId),
3829                                       le64_to_cpu(req->PersistentFileId));
3830         if (!dir_fp) {
3831                 rc = -EBADF;
3832                 goto err_out2;
3833         }
3834
3835         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3836             inode_permission(file_mnt_user_ns(dir_fp->filp),
3837                              file_inode(dir_fp->filp),
3838                              MAY_READ | MAY_EXEC)) {
3839                 pr_err("no right to enumerate directory (%pd)\n",
3840                        dir_fp->filp->f_path.dentry);
3841                 rc = -EACCES;
3842                 goto err_out2;
3843         }
3844
3845         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3846                 pr_err("can't do query dir for a file\n");
3847                 rc = -EINVAL;
3848                 goto err_out2;
3849         }
3850
3851         srch_flag = req->Flags;
3852         srch_ptr = smb_strndup_from_utf16(req->Buffer,
3853                                           le16_to_cpu(req->FileNameLength), 1,
3854                                           conn->local_nls);
3855         if (IS_ERR(srch_ptr)) {
3856                 ksmbd_debug(SMB, "Search Pattern not found\n");
3857                 rc = -EINVAL;
3858                 goto err_out2;
3859         } else {
3860                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3861         }
3862
3863         ksmbd_debug(SMB, "Directory name is %s\n", dir_fp->filename);
3864
3865         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3866                 ksmbd_debug(SMB, "Restart directory scan\n");
3867                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3868                 restart_ctx(&dir_fp->readdir_data.ctx);
3869         }
3870
3871         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3872         d_info.wptr = (char *)rsp->Buffer;
3873         d_info.rptr = (char *)rsp->Buffer;
3874         d_info.out_buf_len = (work->response_sz - (get_rfc1002_len(rsp_org) + 4));
3875         d_info.out_buf_len = min_t(int, d_info.out_buf_len, le32_to_cpu(req->OutputBufferLength)) -
3876                 sizeof(struct smb2_query_directory_rsp);
3877         d_info.flags = srch_flag;
3878
3879         /*
3880          * reserve dot and dotdot entries in head of buffer
3881          * in first response
3882          */
3883         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3884                                                dir_fp, &d_info, srch_ptr,
3885                                                smb2_populate_readdir_entry);
3886         if (rc == -ENOSPC)
3887                 rc = 0;
3888         else if (rc)
3889                 goto err_out;
3890
3891         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3892                 d_info.hide_dot_file = true;
3893
3894         buffer_sz                               = d_info.out_buf_len;
3895         d_info.rptr                             = d_info.wptr;
3896         query_dir_private.work                  = work;
3897         query_dir_private.search_pattern        = srch_ptr;
3898         query_dir_private.dir_fp                = dir_fp;
3899         query_dir_private.d_info                = &d_info;
3900         query_dir_private.info_level            = req->FileInformationClass;
3901         dir_fp->readdir_data.private            = &query_dir_private;
3902         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3903
3904         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3905         if (rc == 0)
3906                 restart_ctx(&dir_fp->readdir_data.ctx);
3907         if (rc == -ENOSPC)
3908                 rc = 0;
3909         if (rc)
3910                 goto err_out;
3911
3912         d_info.wptr = d_info.rptr;
3913         d_info.out_buf_len = buffer_sz;
3914         rc = process_query_dir_entries(&query_dir_private);
3915         if (rc)
3916                 goto err_out;
3917
3918         if (!d_info.data_count && d_info.out_buf_len >= 0) {
3919                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3920                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3921                 } else {
3922                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3923                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
3924                 }
3925                 rsp->StructureSize = cpu_to_le16(9);
3926                 rsp->OutputBufferOffset = cpu_to_le16(0);
3927                 rsp->OutputBufferLength = cpu_to_le32(0);
3928                 rsp->Buffer[0] = 0;
3929                 inc_rfc1001_len(rsp_org, 9);
3930         } else {
3931                 ((struct file_directory_info *)
3932                 ((char *)rsp->Buffer + d_info.last_entry_offset))
3933                 ->NextEntryOffset = 0;
3934
3935                 rsp->StructureSize = cpu_to_le16(9);
3936                 rsp->OutputBufferOffset = cpu_to_le16(72);
3937                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
3938                 inc_rfc1001_len(rsp_org, 8 + d_info.data_count);
3939         }
3940
3941         kfree(srch_ptr);
3942         ksmbd_fd_put(work, dir_fp);
3943         ksmbd_revert_fsids(work);
3944         return 0;
3945
3946 err_out:
3947         pr_err("error while processing smb2 query dir rc = %d\n", rc);
3948         kfree(srch_ptr);
3949
3950 err_out2:
3951         if (rc == -EINVAL)
3952                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3953         else if (rc == -EACCES)
3954                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3955         else if (rc == -ENOENT)
3956                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3957         else if (rc == -EBADF)
3958                 rsp->hdr.Status = STATUS_FILE_CLOSED;
3959         else if (rc == -ENOMEM)
3960                 rsp->hdr.Status = STATUS_NO_MEMORY;
3961         else if (rc == -EFAULT)
3962                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
3963         if (!rsp->hdr.Status)
3964                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3965
3966         smb2_set_err_rsp(work);
3967         ksmbd_fd_put(work, dir_fp);
3968         ksmbd_revert_fsids(work);
3969         return 0;
3970 }
3971
3972 /**
3973  * buffer_check_err() - helper function to check buffer errors
3974  * @reqOutputBufferLength:      max buffer length expected in command response
3975  * @rsp:                query info response buffer contains output buffer length
3976  * @infoclass_size:     query info class response buffer size
3977  *
3978  * Return:      0 on success, otherwise error
3979  */
3980 static int buffer_check_err(int reqOutputBufferLength,
3981                             struct smb2_query_info_rsp *rsp, int infoclass_size)
3982 {
3983         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
3984                 if (reqOutputBufferLength < infoclass_size) {
3985                         pr_err("Invalid Buffer Size Requested\n");
3986                         rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
3987                         rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4);
3988                         return -EINVAL;
3989                 }
3990
3991                 ksmbd_debug(SMB, "Buffer Overflow\n");
3992                 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
3993                 rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4 +
3994                                 reqOutputBufferLength);
3995                 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
3996         }
3997         return 0;
3998 }
3999
4000 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp)
4001 {
4002         struct smb2_file_standard_info *sinfo;
4003
4004         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4005
4006         sinfo->AllocationSize = cpu_to_le64(4096);
4007         sinfo->EndOfFile = cpu_to_le64(0);
4008         sinfo->NumberOfLinks = cpu_to_le32(1);
4009         sinfo->DeletePending = 1;
4010         sinfo->Directory = 0;
4011         rsp->OutputBufferLength =
4012                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4013         inc_rfc1001_len(rsp, sizeof(struct smb2_file_standard_info));
4014 }
4015
4016 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num)
4017 {
4018         struct smb2_file_internal_info *file_info;
4019
4020         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4021
4022         /* any unique number */
4023         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4024         rsp->OutputBufferLength =
4025                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4026         inc_rfc1001_len(rsp, sizeof(struct smb2_file_internal_info));
4027 }
4028
4029 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4030                                    struct smb2_query_info_req *req,
4031                                    struct smb2_query_info_rsp *rsp)
4032 {
4033         u64 id;
4034         int rc;
4035
4036         /*
4037          * Windows can sometime send query file info request on
4038          * pipe without opening it, checking error condition here
4039          */
4040         id = le64_to_cpu(req->VolatileFileId);
4041         if (!ksmbd_session_rpc_method(sess, id))
4042                 return -ENOENT;
4043
4044         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4045                     req->FileInfoClass, le64_to_cpu(req->VolatileFileId));
4046
4047         switch (req->FileInfoClass) {
4048         case FILE_STANDARD_INFORMATION:
4049                 get_standard_info_pipe(rsp);
4050                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4051                                       rsp, FILE_STANDARD_INFORMATION_SIZE);
4052                 break;
4053         case FILE_INTERNAL_INFORMATION:
4054                 get_internal_info_pipe(rsp, id);
4055                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4056                                       rsp, FILE_INTERNAL_INFORMATION_SIZE);
4057                 break;
4058         default:
4059                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4060                             req->FileInfoClass);
4061                 rc = -EOPNOTSUPP;
4062         }
4063         return rc;
4064 }
4065
4066 /**
4067  * smb2_get_ea() - handler for smb2 get extended attribute command
4068  * @work:       smb work containing query info command buffer
4069  * @fp:         ksmbd_file pointer
4070  * @req:        get extended attribute request
4071  * @rsp:        response buffer pointer
4072  * @rsp_org:    base response buffer pointer in case of chained response
4073  *
4074  * Return:      0 on success, otherwise error
4075  */
4076 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4077                        struct smb2_query_info_req *req,
4078                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4079 {
4080         struct smb2_ea_info *eainfo, *prev_eainfo;
4081         char *name, *ptr, *xattr_list = NULL, *buf;
4082         int rc, name_len, value_len, xattr_list_len, idx;
4083         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4084         struct smb2_ea_info_req *ea_req = NULL;
4085         struct path *path;
4086         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4087
4088         if (!(fp->daccess & FILE_READ_EA_LE)) {
4089                 pr_err("Not permitted to read ext attr : 0x%x\n",
4090                        fp->daccess);
4091                 return -EACCES;
4092         }
4093
4094         path = &fp->filp->f_path;
4095         /* single EA entry is requested with given user.* name */
4096         if (req->InputBufferLength) {
4097                 if (le32_to_cpu(req->InputBufferLength) <
4098                     sizeof(struct smb2_ea_info_req))
4099                         return -EINVAL;
4100
4101                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4102         } else {
4103                 /* need to send all EAs, if no specific EA is requested*/
4104                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4105                         ksmbd_debug(SMB,
4106                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4107                                     le32_to_cpu(req->Flags));
4108         }
4109
4110         buf_free_len = work->response_sz -
4111                         (get_rfc1002_len(rsp_org) + 4) -
4112                         sizeof(struct smb2_query_info_rsp);
4113
4114         if (le32_to_cpu(req->OutputBufferLength) < buf_free_len)
4115                 buf_free_len = le32_to_cpu(req->OutputBufferLength);
4116
4117         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4118         if (rc < 0) {
4119                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4120                 goto out;
4121         } else if (!rc) { /* there is no EA in the file */
4122                 ksmbd_debug(SMB, "no ea data in the file\n");
4123                 goto done;
4124         }
4125         xattr_list_len = rc;
4126
4127         ptr = (char *)rsp->Buffer;
4128         eainfo = (struct smb2_ea_info *)ptr;
4129         prev_eainfo = eainfo;
4130         idx = 0;
4131
4132         while (idx < xattr_list_len) {
4133                 name = xattr_list + idx;
4134                 name_len = strlen(name);
4135
4136                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4137                 idx += name_len + 1;
4138
4139                 /*
4140                  * CIFS does not support EA other than user.* namespace,
4141                  * still keep the framework generic, to list other attrs
4142                  * in future.
4143                  */
4144                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4145                         continue;
4146
4147                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4148                              STREAM_PREFIX_LEN))
4149                         continue;
4150
4151                 if (req->InputBufferLength &&
4152                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4153                             ea_req->EaNameLength))
4154                         continue;
4155
4156                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4157                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4158                         continue;
4159
4160                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4161                         name_len -= XATTR_USER_PREFIX_LEN;
4162
4163                 ptr = (char *)(&eainfo->name + name_len + 1);
4164                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4165                                 name_len + 1);
4166                 /* bailout if xattr can't fit in buf_free_len */
4167                 value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4168                                                name, &buf);
4169                 if (value_len <= 0) {
4170                         rc = -ENOENT;
4171                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4172                         goto out;
4173                 }
4174
4175                 buf_free_len -= value_len;
4176                 if (buf_free_len < 0) {
4177                         kfree(buf);
4178                         break;
4179                 }
4180
4181                 memcpy(ptr, buf, value_len);
4182                 kfree(buf);
4183
4184                 ptr += value_len;
4185                 eainfo->Flags = 0;
4186                 eainfo->EaNameLength = name_len;
4187
4188                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4189                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4190                                name_len);
4191                 else
4192                         memcpy(eainfo->name, name, name_len);
4193
4194                 eainfo->name[name_len] = '\0';
4195                 eainfo->EaValueLength = cpu_to_le16(value_len);
4196                 next_offset = offsetof(struct smb2_ea_info, name) +
4197                         name_len + 1 + value_len;
4198
4199                 /* align next xattr entry at 4 byte bundary */
4200                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4201                 if (alignment_bytes) {
4202                         memset(ptr, '\0', alignment_bytes);
4203                         ptr += alignment_bytes;
4204                         next_offset += alignment_bytes;
4205                         buf_free_len -= alignment_bytes;
4206                 }
4207                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4208                 prev_eainfo = eainfo;
4209                 eainfo = (struct smb2_ea_info *)ptr;
4210                 rsp_data_cnt += next_offset;
4211
4212                 if (req->InputBufferLength) {
4213                         ksmbd_debug(SMB, "single entry requested\n");
4214                         break;
4215                 }
4216         }
4217
4218         /* no more ea entries */
4219         prev_eainfo->NextEntryOffset = 0;
4220 done:
4221         rc = 0;
4222         if (rsp_data_cnt == 0)
4223                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4224         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4225         inc_rfc1001_len(rsp_org, rsp_data_cnt);
4226 out:
4227         kvfree(xattr_list);
4228         return rc;
4229 }
4230
4231 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4232                                  struct ksmbd_file *fp, void *rsp_org)
4233 {
4234         struct smb2_file_access_info *file_info;
4235
4236         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4237         file_info->AccessFlags = fp->daccess;
4238         rsp->OutputBufferLength =
4239                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4240         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4241 }
4242
4243 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4244                                struct ksmbd_file *fp, void *rsp_org)
4245 {
4246         struct smb2_file_basic_info *basic_info;
4247         struct kstat stat;
4248         u64 time;
4249
4250         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4251                 pr_err("no right to read the attributes : 0x%x\n",
4252                        fp->daccess);
4253                 return -EACCES;
4254         }
4255
4256         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4257         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4258                          &stat);
4259         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4260         time = ksmbd_UnixTimeToNT(stat.atime);
4261         basic_info->LastAccessTime = cpu_to_le64(time);
4262         time = ksmbd_UnixTimeToNT(stat.mtime);
4263         basic_info->LastWriteTime = cpu_to_le64(time);
4264         time = ksmbd_UnixTimeToNT(stat.ctime);
4265         basic_info->ChangeTime = cpu_to_le64(time);
4266         basic_info->Attributes = fp->f_ci->m_fattr;
4267         basic_info->Pad1 = 0;
4268         rsp->OutputBufferLength =
4269                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4270         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4271         return 0;
4272 }
4273
4274 static unsigned long long get_allocation_size(struct inode *inode,
4275                                               struct kstat *stat)
4276 {
4277         unsigned long long alloc_size = 0;
4278
4279         if (!S_ISDIR(stat->mode)) {
4280                 if ((inode->i_blocks << 9) <= stat->size)
4281                         alloc_size = stat->size;
4282                 else
4283                         alloc_size = inode->i_blocks << 9;
4284         }
4285
4286         return alloc_size;
4287 }
4288
4289 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4290                                    struct ksmbd_file *fp, void *rsp_org)
4291 {
4292         struct smb2_file_standard_info *sinfo;
4293         unsigned int delete_pending;
4294         struct inode *inode;
4295         struct kstat stat;
4296
4297         inode = file_inode(fp->filp);
4298         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4299
4300         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4301         delete_pending = ksmbd_inode_pending_delete(fp);
4302
4303         sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4304         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4305         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4306         sinfo->DeletePending = delete_pending;
4307         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4308         rsp->OutputBufferLength =
4309                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4310         inc_rfc1001_len(rsp_org,
4311                         sizeof(struct smb2_file_standard_info));
4312 }
4313
4314 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4315                                     void *rsp_org)
4316 {
4317         struct smb2_file_alignment_info *file_info;
4318
4319         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4320         file_info->AlignmentRequirement = 0;
4321         rsp->OutputBufferLength =
4322                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4323         inc_rfc1001_len(rsp_org,
4324                         sizeof(struct smb2_file_alignment_info));
4325 }
4326
4327 static int get_file_all_info(struct ksmbd_work *work,
4328                              struct smb2_query_info_rsp *rsp,
4329                              struct ksmbd_file *fp,
4330                              void *rsp_org)
4331 {
4332         struct ksmbd_conn *conn = work->conn;
4333         struct smb2_file_all_info *file_info;
4334         unsigned int delete_pending;
4335         struct inode *inode;
4336         struct kstat stat;
4337         int conv_len;
4338         char *filename;
4339         u64 time;
4340
4341         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4342                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4343                             fp->daccess);
4344                 return -EACCES;
4345         }
4346
4347         filename = convert_to_nt_pathname(fp->filename);
4348         if (!filename)
4349                 return -ENOMEM;
4350
4351         inode = file_inode(fp->filp);
4352         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4353
4354         ksmbd_debug(SMB, "filename = %s\n", filename);
4355         delete_pending = ksmbd_inode_pending_delete(fp);
4356         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4357
4358         file_info->CreationTime = cpu_to_le64(fp->create_time);
4359         time = ksmbd_UnixTimeToNT(stat.atime);
4360         file_info->LastAccessTime = cpu_to_le64(time);
4361         time = ksmbd_UnixTimeToNT(stat.mtime);
4362         file_info->LastWriteTime = cpu_to_le64(time);
4363         time = ksmbd_UnixTimeToNT(stat.ctime);
4364         file_info->ChangeTime = cpu_to_le64(time);
4365         file_info->Attributes = fp->f_ci->m_fattr;
4366         file_info->Pad1 = 0;
4367         file_info->AllocationSize =
4368                 cpu_to_le64(get_allocation_size(inode, &stat));
4369         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4370         file_info->NumberOfLinks =
4371                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4372         file_info->DeletePending = delete_pending;
4373         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4374         file_info->Pad2 = 0;
4375         file_info->IndexNumber = cpu_to_le64(stat.ino);
4376         file_info->EASize = 0;
4377         file_info->AccessFlags = fp->daccess;
4378         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4379         file_info->Mode = fp->coption;
4380         file_info->AlignmentRequirement = 0;
4381         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4382                                      PATH_MAX, conn->local_nls, 0);
4383         conv_len *= 2;
4384         file_info->FileNameLength = cpu_to_le32(conv_len);
4385         rsp->OutputBufferLength =
4386                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4387         kfree(filename);
4388         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4389         return 0;
4390 }
4391
4392 static void get_file_alternate_info(struct ksmbd_work *work,
4393                                     struct smb2_query_info_rsp *rsp,
4394                                     struct ksmbd_file *fp,
4395                                     void *rsp_org)
4396 {
4397         struct ksmbd_conn *conn = work->conn;
4398         struct smb2_file_alt_name_info *file_info;
4399         struct dentry *dentry = fp->filp->f_path.dentry;
4400         int conv_len;
4401
4402         spin_lock(&dentry->d_lock);
4403         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4404         conv_len = ksmbd_extract_shortname(conn,
4405                                            dentry->d_name.name,
4406                                            file_info->FileName);
4407         spin_unlock(&dentry->d_lock);
4408         file_info->FileNameLength = cpu_to_le32(conv_len);
4409         rsp->OutputBufferLength =
4410                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4411         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4412 }
4413
4414 static void get_file_stream_info(struct ksmbd_work *work,
4415                                  struct smb2_query_info_rsp *rsp,
4416                                  struct ksmbd_file *fp,
4417                                  void *rsp_org)
4418 {
4419         struct ksmbd_conn *conn = work->conn;
4420         struct smb2_file_stream_info *file_info;
4421         char *stream_name, *xattr_list = NULL, *stream_buf;
4422         struct kstat stat;
4423         struct path *path = &fp->filp->f_path;
4424         ssize_t xattr_list_len;
4425         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4426
4427         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4428                          &stat);
4429         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4430
4431         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4432         if (xattr_list_len < 0) {
4433                 goto out;
4434         } else if (!xattr_list_len) {
4435                 ksmbd_debug(SMB, "empty xattr in the file\n");
4436                 goto out;
4437         }
4438
4439         while (idx < xattr_list_len) {
4440                 stream_name = xattr_list + idx;
4441                 streamlen = strlen(stream_name);
4442                 idx += streamlen + 1;
4443
4444                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4445
4446                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4447                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4448                         continue;
4449
4450                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4451                                 STREAM_PREFIX_LEN);
4452                 streamlen = stream_name_len;
4453
4454                 /* plus : size */
4455                 streamlen += 1;
4456                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4457                 if (!stream_buf)
4458                         break;
4459
4460                 streamlen = snprintf(stream_buf, streamlen + 1,
4461                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4462
4463                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4464                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4465                                                stream_buf, streamlen,
4466                                                conn->local_nls, 0);
4467                 streamlen *= 2;
4468                 kfree(stream_buf);
4469                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4470                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4471                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4472
4473                 next = sizeof(struct smb2_file_stream_info) + streamlen;
4474                 nbytes += next;
4475                 file_info->NextEntryOffset = cpu_to_le32(next);
4476         }
4477
4478         if (!S_ISDIR(stat.mode)) {
4479                 file_info = (struct smb2_file_stream_info *)
4480                         &rsp->Buffer[nbytes];
4481                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4482                                               "::$DATA", 7, conn->local_nls, 0);
4483                 streamlen *= 2;
4484                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4485                 file_info->StreamSize = 0;
4486                 file_info->StreamAllocationSize = 0;
4487                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4488         }
4489
4490         /* last entry offset should be 0 */
4491         file_info->NextEntryOffset = 0;
4492 out:
4493         kvfree(xattr_list);
4494
4495         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4496         inc_rfc1001_len(rsp_org, nbytes);
4497 }
4498
4499 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4500                                    struct ksmbd_file *fp, void *rsp_org)
4501 {
4502         struct smb2_file_internal_info *file_info;
4503         struct kstat stat;
4504
4505         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4506                          &stat);
4507         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4508         file_info->IndexNumber = cpu_to_le64(stat.ino);
4509         rsp->OutputBufferLength =
4510                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4511         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4512 }
4513
4514 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4515                                       struct ksmbd_file *fp, void *rsp_org)
4516 {
4517         struct smb2_file_ntwrk_info *file_info;
4518         struct inode *inode;
4519         struct kstat stat;
4520         u64 time;
4521
4522         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4523                 pr_err("no right to read the attributes : 0x%x\n",
4524                        fp->daccess);
4525                 return -EACCES;
4526         }
4527
4528         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4529
4530         inode = file_inode(fp->filp);
4531         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4532
4533         file_info->CreationTime = cpu_to_le64(fp->create_time);
4534         time = ksmbd_UnixTimeToNT(stat.atime);
4535         file_info->LastAccessTime = cpu_to_le64(time);
4536         time = ksmbd_UnixTimeToNT(stat.mtime);
4537         file_info->LastWriteTime = cpu_to_le64(time);
4538         time = ksmbd_UnixTimeToNT(stat.ctime);
4539         file_info->ChangeTime = cpu_to_le64(time);
4540         file_info->Attributes = fp->f_ci->m_fattr;
4541         file_info->AllocationSize =
4542                 cpu_to_le64(get_allocation_size(inode, &stat));
4543         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4544         file_info->Reserved = cpu_to_le32(0);
4545         rsp->OutputBufferLength =
4546                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4547         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4548         return 0;
4549 }
4550
4551 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4552 {
4553         struct smb2_file_ea_info *file_info;
4554
4555         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4556         file_info->EASize = 0;
4557         rsp->OutputBufferLength =
4558                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4559         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4560 }
4561
4562 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4563                                    struct ksmbd_file *fp, void *rsp_org)
4564 {
4565         struct smb2_file_pos_info *file_info;
4566
4567         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4568         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4569         rsp->OutputBufferLength =
4570                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4571         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4572 }
4573
4574 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4575                                struct ksmbd_file *fp, void *rsp_org)
4576 {
4577         struct smb2_file_mode_info *file_info;
4578
4579         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4580         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4581         rsp->OutputBufferLength =
4582                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4583         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4584 }
4585
4586 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4587                                       struct ksmbd_file *fp, void *rsp_org)
4588 {
4589         struct smb2_file_comp_info *file_info;
4590         struct kstat stat;
4591
4592         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4593                          &stat);
4594
4595         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4596         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4597         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4598         file_info->CompressionUnitShift = 0;
4599         file_info->ChunkShift = 0;
4600         file_info->ClusterShift = 0;
4601         memset(&file_info->Reserved[0], 0, 3);
4602
4603         rsp->OutputBufferLength =
4604                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4605         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4606 }
4607
4608 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4609                                        struct ksmbd_file *fp, void *rsp_org)
4610 {
4611         struct smb2_file_attr_tag_info *file_info;
4612
4613         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4614                 pr_err("no right to read the attributes : 0x%x\n",
4615                        fp->daccess);
4616                 return -EACCES;
4617         }
4618
4619         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4620         file_info->FileAttributes = fp->f_ci->m_fattr;
4621         file_info->ReparseTag = 0;
4622         rsp->OutputBufferLength =
4623                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4624         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4625         return 0;
4626 }
4627
4628 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4629                                 struct ksmbd_file *fp, void *rsp_org)
4630 {
4631         struct smb311_posix_qinfo *file_info;
4632         struct inode *inode = file_inode(fp->filp);
4633         u64 time;
4634
4635         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4636         file_info->CreationTime = cpu_to_le64(fp->create_time);
4637         time = ksmbd_UnixTimeToNT(inode->i_atime);
4638         file_info->LastAccessTime = cpu_to_le64(time);
4639         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4640         file_info->LastWriteTime = cpu_to_le64(time);
4641         time = ksmbd_UnixTimeToNT(inode->i_ctime);
4642         file_info->ChangeTime = cpu_to_le64(time);
4643         file_info->DosAttributes = fp->f_ci->m_fattr;
4644         file_info->Inode = cpu_to_le64(inode->i_ino);
4645         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4646         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4647         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4648         file_info->Mode = cpu_to_le32(inode->i_mode);
4649         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4650         rsp->OutputBufferLength =
4651                 cpu_to_le32(sizeof(struct smb311_posix_qinfo));
4652         inc_rfc1001_len(rsp_org, sizeof(struct smb311_posix_qinfo));
4653         return 0;
4654 }
4655
4656 static int smb2_get_info_file(struct ksmbd_work *work,
4657                               struct smb2_query_info_req *req,
4658                               struct smb2_query_info_rsp *rsp, void *rsp_org)
4659 {
4660         struct ksmbd_file *fp;
4661         int fileinfoclass = 0;
4662         int rc = 0;
4663         int file_infoclass_size;
4664         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4665
4666         if (test_share_config_flag(work->tcon->share_conf,
4667                                    KSMBD_SHARE_FLAG_PIPE)) {
4668                 /* smb2 info file called for pipe */
4669                 return smb2_get_info_file_pipe(work->sess, req, rsp);
4670         }
4671
4672         if (work->next_smb2_rcv_hdr_off) {
4673                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
4674                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4675                                     work->compound_fid);
4676                         id = work->compound_fid;
4677                         pid = work->compound_pfid;
4678                 }
4679         }
4680
4681         if (!has_file_id(id)) {
4682                 id = le64_to_cpu(req->VolatileFileId);
4683                 pid = le64_to_cpu(req->PersistentFileId);
4684         }
4685
4686         fp = ksmbd_lookup_fd_slow(work, id, pid);
4687         if (!fp)
4688                 return -ENOENT;
4689
4690         fileinfoclass = req->FileInfoClass;
4691
4692         switch (fileinfoclass) {
4693         case FILE_ACCESS_INFORMATION:
4694                 get_file_access_info(rsp, fp, rsp_org);
4695                 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4696                 break;
4697
4698         case FILE_BASIC_INFORMATION:
4699                 rc = get_file_basic_info(rsp, fp, rsp_org);
4700                 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4701                 break;
4702
4703         case FILE_STANDARD_INFORMATION:
4704                 get_file_standard_info(rsp, fp, rsp_org);
4705                 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4706                 break;
4707
4708         case FILE_ALIGNMENT_INFORMATION:
4709                 get_file_alignment_info(rsp, rsp_org);
4710                 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4711                 break;
4712
4713         case FILE_ALL_INFORMATION:
4714                 rc = get_file_all_info(work, rsp, fp, rsp_org);
4715                 file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4716                 break;
4717
4718         case FILE_ALTERNATE_NAME_INFORMATION:
4719                 get_file_alternate_info(work, rsp, fp, rsp_org);
4720                 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4721                 break;
4722
4723         case FILE_STREAM_INFORMATION:
4724                 get_file_stream_info(work, rsp, fp, rsp_org);
4725                 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4726                 break;
4727
4728         case FILE_INTERNAL_INFORMATION:
4729                 get_file_internal_info(rsp, fp, rsp_org);
4730                 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4731                 break;
4732
4733         case FILE_NETWORK_OPEN_INFORMATION:
4734                 rc = get_file_network_open_info(rsp, fp, rsp_org);
4735                 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4736                 break;
4737
4738         case FILE_EA_INFORMATION:
4739                 get_file_ea_info(rsp, rsp_org);
4740                 file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4741                 break;
4742
4743         case FILE_FULL_EA_INFORMATION:
4744                 rc = smb2_get_ea(work, fp, req, rsp, rsp_org);
4745                 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4746                 break;
4747
4748         case FILE_POSITION_INFORMATION:
4749                 get_file_position_info(rsp, fp, rsp_org);
4750                 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4751                 break;
4752
4753         case FILE_MODE_INFORMATION:
4754                 get_file_mode_info(rsp, fp, rsp_org);
4755                 file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4756                 break;
4757
4758         case FILE_COMPRESSION_INFORMATION:
4759                 get_file_compression_info(rsp, fp, rsp_org);
4760                 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4761                 break;
4762
4763         case FILE_ATTRIBUTE_TAG_INFORMATION:
4764                 rc = get_file_attribute_tag_info(rsp, fp, rsp_org);
4765                 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4766                 break;
4767         case SMB_FIND_FILE_POSIX_INFO:
4768                 if (!work->tcon->posix_extensions) {
4769                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4770                         rc = -EOPNOTSUPP;
4771                 } else {
4772                         rc = find_file_posix_info(rsp, fp, rsp_org);
4773                         file_infoclass_size = sizeof(struct smb311_posix_qinfo);
4774                 }
4775                 break;
4776         default:
4777                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4778                             fileinfoclass);
4779                 rc = -EOPNOTSUPP;
4780         }
4781         if (!rc)
4782                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4783                                       rsp,
4784                                       file_infoclass_size);
4785         ksmbd_fd_put(work, fp);
4786         return rc;
4787 }
4788
4789 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4790                                     struct smb2_query_info_req *req,
4791                                     struct smb2_query_info_rsp *rsp, void *rsp_org)
4792 {
4793         struct ksmbd_session *sess = work->sess;
4794         struct ksmbd_conn *conn = sess->conn;
4795         struct ksmbd_share_config *share = work->tcon->share_conf;
4796         int fsinfoclass = 0;
4797         struct kstatfs stfs;
4798         struct path path;
4799         int rc = 0, len;
4800         int fs_infoclass_size = 0;
4801
4802         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4803         if (rc) {
4804                 pr_err("cannot create vfs path\n");
4805                 return -EIO;
4806         }
4807
4808         rc = vfs_statfs(&path, &stfs);
4809         if (rc) {
4810                 pr_err("cannot do stat of path %s\n", share->path);
4811                 path_put(&path);
4812                 return -EIO;
4813         }
4814
4815         fsinfoclass = req->FileInfoClass;
4816
4817         switch (fsinfoclass) {
4818         case FS_DEVICE_INFORMATION:
4819         {
4820                 struct filesystem_device_info *info;
4821
4822                 info = (struct filesystem_device_info *)rsp->Buffer;
4823
4824                 info->DeviceType = cpu_to_le32(stfs.f_type);
4825                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4826                 rsp->OutputBufferLength = cpu_to_le32(8);
4827                 inc_rfc1001_len(rsp_org, 8);
4828                 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4829                 break;
4830         }
4831         case FS_ATTRIBUTE_INFORMATION:
4832         {
4833                 struct filesystem_attribute_info *info;
4834                 size_t sz;
4835
4836                 info = (struct filesystem_attribute_info *)rsp->Buffer;
4837                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4838                                                FILE_PERSISTENT_ACLS |
4839                                                FILE_UNICODE_ON_DISK |
4840                                                FILE_CASE_PRESERVED_NAMES |
4841                                                FILE_CASE_SENSITIVE_SEARCH |
4842                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
4843
4844                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4845
4846                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4847                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4848                                         "NTFS", PATH_MAX, conn->local_nls, 0);
4849                 len = len * 2;
4850                 info->FileSystemNameLen = cpu_to_le32(len);
4851                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4852                 rsp->OutputBufferLength = cpu_to_le32(sz);
4853                 inc_rfc1001_len(rsp_org, sz);
4854                 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4855                 break;
4856         }
4857         case FS_VOLUME_INFORMATION:
4858         {
4859                 struct filesystem_vol_info *info;
4860                 size_t sz;
4861
4862                 info = (struct filesystem_vol_info *)(rsp->Buffer);
4863                 info->VolumeCreationTime = 0;
4864                 /* Taking dummy value of serial number*/
4865                 info->SerialNumber = cpu_to_le32(0xbc3ac512);
4866                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4867                                         share->name, PATH_MAX,
4868                                         conn->local_nls, 0);
4869                 len = len * 2;
4870                 info->VolumeLabelSize = cpu_to_le32(len);
4871                 info->Reserved = 0;
4872                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
4873                 rsp->OutputBufferLength = cpu_to_le32(sz);
4874                 inc_rfc1001_len(rsp_org, sz);
4875                 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4876                 break;
4877         }
4878         case FS_SIZE_INFORMATION:
4879         {
4880                 struct filesystem_info *info;
4881
4882                 info = (struct filesystem_info *)(rsp->Buffer);
4883                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4884                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
4885                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4886                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4887                 rsp->OutputBufferLength = cpu_to_le32(24);
4888                 inc_rfc1001_len(rsp_org, 24);
4889                 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
4890                 break;
4891         }
4892         case FS_FULL_SIZE_INFORMATION:
4893         {
4894                 struct smb2_fs_full_size_info *info;
4895
4896                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
4897                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4898                 info->CallerAvailableAllocationUnits =
4899                                         cpu_to_le64(stfs.f_bavail);
4900                 info->ActualAvailableAllocationUnits =
4901                                         cpu_to_le64(stfs.f_bfree);
4902                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4903                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4904                 rsp->OutputBufferLength = cpu_to_le32(32);
4905                 inc_rfc1001_len(rsp_org, 32);
4906                 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
4907                 break;
4908         }
4909         case FS_OBJECT_ID_INFORMATION:
4910         {
4911                 struct object_id_info *info;
4912
4913                 info = (struct object_id_info *)(rsp->Buffer);
4914
4915                 if (!user_guest(sess->user))
4916                         memcpy(info->objid, user_passkey(sess->user), 16);
4917                 else
4918                         memset(info->objid, 0, 16);
4919
4920                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
4921                 info->extended_info.version = cpu_to_le32(1);
4922                 info->extended_info.release = cpu_to_le32(1);
4923                 info->extended_info.rel_date = 0;
4924                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
4925                 rsp->OutputBufferLength = cpu_to_le32(64);
4926                 inc_rfc1001_len(rsp_org, 64);
4927                 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
4928                 break;
4929         }
4930         case FS_SECTOR_SIZE_INFORMATION:
4931         {
4932                 struct smb3_fs_ss_info *info;
4933
4934                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
4935
4936                 info->LogicalBytesPerSector = cpu_to_le32(stfs.f_bsize);
4937                 info->PhysicalBytesPerSectorForAtomicity =
4938                                 cpu_to_le32(stfs.f_bsize);
4939                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(stfs.f_bsize);
4940                 info->FSEffPhysicalBytesPerSectorForAtomicity =
4941                                 cpu_to_le32(stfs.f_bsize);
4942                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
4943                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
4944                 info->ByteOffsetForSectorAlignment = 0;
4945                 info->ByteOffsetForPartitionAlignment = 0;
4946                 rsp->OutputBufferLength = cpu_to_le32(28);
4947                 inc_rfc1001_len(rsp_org, 28);
4948                 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
4949                 break;
4950         }
4951         case FS_CONTROL_INFORMATION:
4952         {
4953                 /*
4954                  * TODO : The current implementation is based on
4955                  * test result with win7(NTFS) server. It's need to
4956                  * modify this to get valid Quota values
4957                  * from Linux kernel
4958                  */
4959                 struct smb2_fs_control_info *info;
4960
4961                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
4962                 info->FreeSpaceStartFiltering = 0;
4963                 info->FreeSpaceThreshold = 0;
4964                 info->FreeSpaceStopFiltering = 0;
4965                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
4966                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
4967                 info->Padding = 0;
4968                 rsp->OutputBufferLength = cpu_to_le32(48);
4969                 inc_rfc1001_len(rsp_org, 48);
4970                 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
4971                 break;
4972         }
4973         case FS_POSIX_INFORMATION:
4974         {
4975                 struct filesystem_posix_info *info;
4976
4977                 if (!work->tcon->posix_extensions) {
4978                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4979                         rc = -EOPNOTSUPP;
4980                 } else {
4981                         info = (struct filesystem_posix_info *)(rsp->Buffer);
4982                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
4983                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
4984                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
4985                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
4986                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
4987                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
4988                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
4989                         rsp->OutputBufferLength = cpu_to_le32(56);
4990                         inc_rfc1001_len(rsp_org, 56);
4991                         fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
4992                 }
4993                 break;
4994         }
4995         default:
4996                 path_put(&path);
4997                 return -EOPNOTSUPP;
4998         }
4999         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5000                               rsp,
5001                               fs_infoclass_size);
5002         path_put(&path);
5003         return rc;
5004 }
5005
5006 static int smb2_get_info_sec(struct ksmbd_work *work,
5007                              struct smb2_query_info_req *req,
5008                              struct smb2_query_info_rsp *rsp, void *rsp_org)
5009 {
5010         struct ksmbd_file *fp;
5011         struct user_namespace *user_ns;
5012         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5013         struct smb_fattr fattr = {{0}};
5014         struct inode *inode;
5015         __u32 secdesclen;
5016         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5017         int addition_info = le32_to_cpu(req->AdditionalInformation);
5018         int rc;
5019
5020         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5021                               PROTECTED_DACL_SECINFO |
5022                               UNPROTECTED_DACL_SECINFO)) {
5023                 pr_err("Unsupported addition info: 0x%x)\n",
5024                        addition_info);
5025
5026                 pntsd->revision = cpu_to_le16(1);
5027                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5028                 pntsd->osidoffset = 0;
5029                 pntsd->gsidoffset = 0;
5030                 pntsd->sacloffset = 0;
5031                 pntsd->dacloffset = 0;
5032
5033                 secdesclen = sizeof(struct smb_ntsd);
5034                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5035                 inc_rfc1001_len(rsp_org, secdesclen);
5036
5037                 return 0;
5038         }
5039
5040         if (work->next_smb2_rcv_hdr_off) {
5041                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5042                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5043                                     work->compound_fid);
5044                         id = work->compound_fid;
5045                         pid = work->compound_pfid;
5046                 }
5047         }
5048
5049         if (!has_file_id(id)) {
5050                 id = le64_to_cpu(req->VolatileFileId);
5051                 pid = le64_to_cpu(req->PersistentFileId);
5052         }
5053
5054         fp = ksmbd_lookup_fd_slow(work, id, pid);
5055         if (!fp)
5056                 return -ENOENT;
5057
5058         user_ns = file_mnt_user_ns(fp->filp);
5059         inode = file_inode(fp->filp);
5060         ksmbd_acls_fattr(&fattr, user_ns, inode);
5061
5062         if (test_share_config_flag(work->tcon->share_conf,
5063                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5064                 ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5065                                        fp->filp->f_path.dentry, &ppntsd);
5066
5067         rc = build_sec_desc(user_ns, pntsd, ppntsd, addition_info,
5068                             &secdesclen, &fattr);
5069         posix_acl_release(fattr.cf_acls);
5070         posix_acl_release(fattr.cf_dacls);
5071         kfree(ppntsd);
5072         ksmbd_fd_put(work, fp);
5073         if (rc)
5074                 return rc;
5075
5076         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5077         inc_rfc1001_len(rsp_org, secdesclen);
5078         return 0;
5079 }
5080
5081 /**
5082  * smb2_query_info() - handler for smb2 query info command
5083  * @work:       smb work containing query info request buffer
5084  *
5085  * Return:      0 on success, otherwise error
5086  */
5087 int smb2_query_info(struct ksmbd_work *work)
5088 {
5089         struct smb2_query_info_req *req;
5090         struct smb2_query_info_rsp *rsp, *rsp_org;
5091         int rc = 0;
5092
5093         rsp_org = work->response_buf;
5094         WORK_BUFFERS(work, req, rsp);
5095
5096         ksmbd_debug(SMB, "GOT query info request\n");
5097
5098         switch (req->InfoType) {
5099         case SMB2_O_INFO_FILE:
5100                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5101                 rc = smb2_get_info_file(work, req, rsp, (void *)rsp_org);
5102                 break;
5103         case SMB2_O_INFO_FILESYSTEM:
5104                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5105                 rc = smb2_get_info_filesystem(work, req, rsp, (void *)rsp_org);
5106                 break;
5107         case SMB2_O_INFO_SECURITY:
5108                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5109                 rc = smb2_get_info_sec(work, req, rsp, (void *)rsp_org);
5110                 break;
5111         default:
5112                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5113                             req->InfoType);
5114                 rc = -EOPNOTSUPP;
5115         }
5116
5117         if (rc < 0) {
5118                 if (rc == -EACCES)
5119                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5120                 else if (rc == -ENOENT)
5121                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5122                 else if (rc == -EIO)
5123                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5124                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5125                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5126                 smb2_set_err_rsp(work);
5127
5128                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5129                             rc);
5130                 return rc;
5131         }
5132         rsp->StructureSize = cpu_to_le16(9);
5133         rsp->OutputBufferOffset = cpu_to_le16(72);
5134         inc_rfc1001_len(rsp_org, 8);
5135         return 0;
5136 }
5137
5138 /**
5139  * smb2_close_pipe() - handler for closing IPC pipe
5140  * @work:       smb work containing close request buffer
5141  *
5142  * Return:      0
5143  */
5144 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5145 {
5146         u64 id;
5147         struct smb2_close_req *req = work->request_buf;
5148         struct smb2_close_rsp *rsp = work->response_buf;
5149
5150         id = le64_to_cpu(req->VolatileFileId);
5151         ksmbd_session_rpc_close(work->sess, id);
5152
5153         rsp->StructureSize = cpu_to_le16(60);
5154         rsp->Flags = 0;
5155         rsp->Reserved = 0;
5156         rsp->CreationTime = 0;
5157         rsp->LastAccessTime = 0;
5158         rsp->LastWriteTime = 0;
5159         rsp->ChangeTime = 0;
5160         rsp->AllocationSize = 0;
5161         rsp->EndOfFile = 0;
5162         rsp->Attributes = 0;
5163         inc_rfc1001_len(rsp, 60);
5164         return 0;
5165 }
5166
5167 /**
5168  * smb2_close() - handler for smb2 close file command
5169  * @work:       smb work containing close request buffer
5170  *
5171  * Return:      0
5172  */
5173 int smb2_close(struct ksmbd_work *work)
5174 {
5175         u64 volatile_id = KSMBD_NO_FID;
5176         u64 sess_id;
5177         struct smb2_close_req *req;
5178         struct smb2_close_rsp *rsp;
5179         struct smb2_close_rsp *rsp_org;
5180         struct ksmbd_conn *conn = work->conn;
5181         struct ksmbd_file *fp;
5182         struct inode *inode;
5183         u64 time;
5184         int err = 0;
5185
5186         rsp_org = work->response_buf;
5187         WORK_BUFFERS(work, req, rsp);
5188
5189         if (test_share_config_flag(work->tcon->share_conf,
5190                                    KSMBD_SHARE_FLAG_PIPE)) {
5191                 ksmbd_debug(SMB, "IPC pipe close request\n");
5192                 return smb2_close_pipe(work);
5193         }
5194
5195         sess_id = le64_to_cpu(req->hdr.SessionId);
5196         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5197                 sess_id = work->compound_sid;
5198
5199         work->compound_sid = 0;
5200         if (check_session_id(conn, sess_id)) {
5201                 work->compound_sid = sess_id;
5202         } else {
5203                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5204                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5205                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5206                 err = -EBADF;
5207                 goto out;
5208         }
5209
5210         if (work->next_smb2_rcv_hdr_off &&
5211             !has_file_id(le64_to_cpu(req->VolatileFileId))) {
5212                 if (!has_file_id(work->compound_fid)) {
5213                         /* file already closed, return FILE_CLOSED */
5214                         ksmbd_debug(SMB, "file already closed\n");
5215                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5216                         err = -EBADF;
5217                         goto out;
5218                 } else {
5219                         ksmbd_debug(SMB,
5220                                     "Compound request set FID = %llu:%llu\n",
5221                                     work->compound_fid,
5222                                     work->compound_pfid);
5223                         volatile_id = work->compound_fid;
5224
5225                         /* file closed, stored id is not valid anymore */
5226                         work->compound_fid = KSMBD_NO_FID;
5227                         work->compound_pfid = KSMBD_NO_FID;
5228                 }
5229         } else {
5230                 volatile_id = le64_to_cpu(req->VolatileFileId);
5231         }
5232         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5233
5234         rsp->StructureSize = cpu_to_le16(60);
5235         rsp->Reserved = 0;
5236
5237         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5238                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5239                 if (!fp) {
5240                         err = -ENOENT;
5241                         goto out;
5242                 }
5243
5244                 inode = file_inode(fp->filp);
5245                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5246                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5247                         cpu_to_le64(inode->i_blocks << 9);
5248                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5249                 rsp->Attributes = fp->f_ci->m_fattr;
5250                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5251                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5252                 rsp->LastAccessTime = cpu_to_le64(time);
5253                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5254                 rsp->LastWriteTime = cpu_to_le64(time);
5255                 time = ksmbd_UnixTimeToNT(inode->i_ctime);
5256                 rsp->ChangeTime = cpu_to_le64(time);
5257                 ksmbd_fd_put(work, fp);
5258         } else {
5259                 rsp->Flags = 0;
5260                 rsp->AllocationSize = 0;
5261                 rsp->EndOfFile = 0;
5262                 rsp->Attributes = 0;
5263                 rsp->CreationTime = 0;
5264                 rsp->LastAccessTime = 0;
5265                 rsp->LastWriteTime = 0;
5266                 rsp->ChangeTime = 0;
5267         }
5268
5269         err = ksmbd_close_fd(work, volatile_id);
5270 out:
5271         if (err) {
5272                 if (rsp->hdr.Status == 0)
5273                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5274                 smb2_set_err_rsp(work);
5275         } else {
5276                 inc_rfc1001_len(rsp_org, 60);
5277         }
5278
5279         return 0;
5280 }
5281
5282 /**
5283  * smb2_echo() - handler for smb2 echo(ping) command
5284  * @work:       smb work containing echo request buffer
5285  *
5286  * Return:      0
5287  */
5288 int smb2_echo(struct ksmbd_work *work)
5289 {
5290         struct smb2_echo_rsp *rsp = work->response_buf;
5291
5292         rsp->StructureSize = cpu_to_le16(4);
5293         rsp->Reserved = 0;
5294         inc_rfc1001_len(rsp, 4);
5295         return 0;
5296 }
5297
5298 static int smb2_rename(struct ksmbd_work *work,
5299                        struct ksmbd_file *fp,
5300                        struct user_namespace *user_ns,
5301                        struct smb2_file_rename_info *file_info,
5302                        struct nls_table *local_nls)
5303 {
5304         struct ksmbd_share_config *share = fp->tcon->share_conf;
5305         char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5306         char *pathname = NULL;
5307         struct path path;
5308         bool file_present = true;
5309         int rc;
5310
5311         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5312         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5313         if (!pathname)
5314                 return -ENOMEM;
5315
5316         abs_oldname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
5317         if (IS_ERR(abs_oldname)) {
5318                 rc = -EINVAL;
5319                 goto out;
5320         }
5321         old_name = strrchr(abs_oldname, '/');
5322         if (old_name && old_name[1] != '\0') {
5323                 old_name++;
5324         } else {
5325                 ksmbd_debug(SMB, "can't get last component in path %s\n",
5326                             abs_oldname);
5327                 rc = -ENOENT;
5328                 goto out;
5329         }
5330
5331         new_name = smb2_get_name(share,
5332                                  file_info->FileName,
5333                                  le32_to_cpu(file_info->FileNameLength),
5334                                  local_nls);
5335         if (IS_ERR(new_name)) {
5336                 rc = PTR_ERR(new_name);
5337                 goto out;
5338         }
5339
5340         if (strchr(new_name, ':')) {
5341                 int s_type;
5342                 char *xattr_stream_name, *stream_name = NULL;
5343                 size_t xattr_stream_size;
5344                 int len;
5345
5346                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5347                 if (rc < 0)
5348                         goto out;
5349
5350                 len = strlen(new_name);
5351                 if (len > 0 && new_name[len - 1] != '/') {
5352                         pr_err("not allow base filename in rename\n");
5353                         rc = -ESHARE;
5354                         goto out;
5355                 }
5356
5357                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5358                                                  &xattr_stream_name,
5359                                                  &xattr_stream_size,
5360                                                  s_type);
5361                 if (rc)
5362                         goto out;
5363
5364                 rc = ksmbd_vfs_setxattr(user_ns,
5365                                         fp->filp->f_path.dentry,
5366                                         xattr_stream_name,
5367                                         NULL, 0, 0);
5368                 if (rc < 0) {
5369                         pr_err("failed to store stream name in xattr: %d\n",
5370                                rc);
5371                         rc = -EINVAL;
5372                         goto out;
5373                 }
5374
5375                 goto out;
5376         }
5377
5378         ksmbd_debug(SMB, "new name %s\n", new_name);
5379         rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5380         if (rc) {
5381                 if (rc != -ENOENT)
5382                         goto out;
5383                 file_present = false;
5384         } else {
5385                 path_put(&path);
5386         }
5387
5388         if (ksmbd_share_veto_filename(share, new_name)) {
5389                 rc = -ENOENT;
5390                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5391                 goto out;
5392         }
5393
5394         if (file_info->ReplaceIfExists) {
5395                 if (file_present) {
5396                         rc = ksmbd_vfs_remove_file(work, new_name);
5397                         if (rc) {
5398                                 if (rc != -ENOTEMPTY)
5399                                         rc = -EINVAL;
5400                                 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5401                                             new_name, rc);
5402                                 goto out;
5403                         }
5404                 }
5405         } else {
5406                 if (file_present &&
5407                     strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5408                         rc = -EEXIST;
5409                         ksmbd_debug(SMB,
5410                                     "cannot rename already existing file\n");
5411                         goto out;
5412                 }
5413         }
5414
5415         rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5416 out:
5417         kfree(pathname);
5418         if (!IS_ERR(new_name))
5419                 kfree(new_name);
5420         return rc;
5421 }
5422
5423 static int smb2_create_link(struct ksmbd_work *work,
5424                             struct ksmbd_share_config *share,
5425                             struct smb2_file_link_info *file_info,
5426                             unsigned int buf_len, struct file *filp,
5427                             struct nls_table *local_nls)
5428 {
5429         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5430         struct path path;
5431         bool file_present = true;
5432         int rc;
5433
5434         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5435                         le32_to_cpu(file_info->FileNameLength))
5436                 return -EINVAL;
5437
5438         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5439         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5440         if (!pathname)
5441                 return -ENOMEM;
5442
5443         link_name = smb2_get_name(share,
5444                                   file_info->FileName,
5445                                   le32_to_cpu(file_info->FileNameLength),
5446                                   local_nls);
5447         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5448                 rc = -EINVAL;
5449                 goto out;
5450         }
5451
5452         ksmbd_debug(SMB, "link name is %s\n", link_name);
5453         target_name = d_path(&filp->f_path, pathname, PATH_MAX);
5454         if (IS_ERR(target_name)) {
5455                 rc = -EINVAL;
5456                 goto out;
5457         }
5458
5459         ksmbd_debug(SMB, "target name is %s\n", target_name);
5460         rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5461         if (rc) {
5462                 if (rc != -ENOENT)
5463                         goto out;
5464                 file_present = false;
5465         } else {
5466                 path_put(&path);
5467         }
5468
5469         if (file_info->ReplaceIfExists) {
5470                 if (file_present) {
5471                         rc = ksmbd_vfs_remove_file(work, link_name);
5472                         if (rc) {
5473                                 rc = -EINVAL;
5474                                 ksmbd_debug(SMB, "cannot delete %s\n",
5475                                             link_name);
5476                                 goto out;
5477                         }
5478                 }
5479         } else {
5480                 if (file_present) {
5481                         rc = -EEXIST;
5482                         ksmbd_debug(SMB, "link already exists\n");
5483                         goto out;
5484                 }
5485         }
5486
5487         rc = ksmbd_vfs_link(work, target_name, link_name);
5488         if (rc)
5489                 rc = -EINVAL;
5490 out:
5491         if (!IS_ERR(link_name))
5492                 kfree(link_name);
5493         kfree(pathname);
5494         return rc;
5495 }
5496
5497 static int set_file_basic_info(struct ksmbd_file *fp,
5498                                struct smb2_file_basic_info *file_info,
5499                                struct ksmbd_share_config *share)
5500 {
5501         struct iattr attrs;
5502         struct timespec64 ctime;
5503         struct file *filp;
5504         struct inode *inode;
5505         struct user_namespace *user_ns;
5506         int rc = 0;
5507
5508         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5509                 return -EACCES;
5510
5511         attrs.ia_valid = 0;
5512         filp = fp->filp;
5513         inode = file_inode(filp);
5514         user_ns = file_mnt_user_ns(filp);
5515
5516         if (file_info->CreationTime)
5517                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5518
5519         if (file_info->LastAccessTime) {
5520                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5521                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5522         }
5523
5524         if (file_info->ChangeTime) {
5525                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5526                 ctime = attrs.ia_ctime;
5527                 attrs.ia_valid |= ATTR_CTIME;
5528         } else {
5529                 ctime = inode->i_ctime;
5530         }
5531
5532         if (file_info->LastWriteTime) {
5533                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5534                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5535         }
5536
5537         if (file_info->Attributes) {
5538                 if (!S_ISDIR(inode->i_mode) &&
5539                     file_info->Attributes & ATTR_DIRECTORY_LE) {
5540                         pr_err("can't change a file to a directory\n");
5541                         return -EINVAL;
5542                 }
5543
5544                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == ATTR_NORMAL_LE))
5545                         fp->f_ci->m_fattr = file_info->Attributes |
5546                                 (fp->f_ci->m_fattr & ATTR_DIRECTORY_LE);
5547         }
5548
5549         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5550             (file_info->CreationTime || file_info->Attributes)) {
5551                 struct xattr_dos_attrib da = {0};
5552
5553                 da.version = 4;
5554                 da.itime = fp->itime;
5555                 da.create_time = fp->create_time;
5556                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5557                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5558                         XATTR_DOSINFO_ITIME;
5559
5560                 rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5561                                                     filp->f_path.dentry, &da);
5562                 if (rc)
5563                         ksmbd_debug(SMB,
5564                                     "failed to restore file attribute in EA\n");
5565                 rc = 0;
5566         }
5567
5568         if (attrs.ia_valid) {
5569                 struct dentry *dentry = filp->f_path.dentry;
5570                 struct inode *inode = d_inode(dentry);
5571
5572                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5573                         return -EACCES;
5574
5575                 inode_lock(inode);
5576                 rc = notify_change(user_ns, dentry, &attrs, NULL);
5577                 if (!rc) {
5578                         inode->i_ctime = ctime;
5579                         mark_inode_dirty(inode);
5580                 }
5581                 inode_unlock(inode);
5582         }
5583         return rc;
5584 }
5585
5586 static int set_file_allocation_info(struct ksmbd_work *work,
5587                                     struct ksmbd_file *fp,
5588                                     struct smb2_file_alloc_info *file_alloc_info)
5589 {
5590         /*
5591          * TODO : It's working fine only when store dos attributes
5592          * is not yes. need to implement a logic which works
5593          * properly with any smb.conf option
5594          */
5595
5596         loff_t alloc_blks;
5597         struct inode *inode;
5598         int rc;
5599
5600         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5601                 return -EACCES;
5602
5603         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5604         inode = file_inode(fp->filp);
5605
5606         if (alloc_blks > inode->i_blocks) {
5607                 smb_break_all_levII_oplock(work, fp, 1);
5608                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5609                                    alloc_blks * 512);
5610                 if (rc && rc != -EOPNOTSUPP) {
5611                         pr_err("vfs_fallocate is failed : %d\n", rc);
5612                         return rc;
5613                 }
5614         } else if (alloc_blks < inode->i_blocks) {
5615                 loff_t size;
5616
5617                 /*
5618                  * Allocation size could be smaller than original one
5619                  * which means allocated blocks in file should be
5620                  * deallocated. use truncate to cut out it, but inode
5621                  * size is also updated with truncate offset.
5622                  * inode size is retained by backup inode size.
5623                  */
5624                 size = i_size_read(inode);
5625                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5626                 if (rc) {
5627                         pr_err("truncate failed! filename : %s, err %d\n",
5628                                fp->filename, rc);
5629                         return rc;
5630                 }
5631                 if (size < alloc_blks * 512)
5632                         i_size_write(inode, size);
5633         }
5634         return 0;
5635 }
5636
5637 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5638                                 struct smb2_file_eof_info *file_eof_info)
5639 {
5640         loff_t newsize;
5641         struct inode *inode;
5642         int rc;
5643
5644         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5645                 return -EACCES;
5646
5647         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5648         inode = file_inode(fp->filp);
5649
5650         /*
5651          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5652          * on FAT32 shared device, truncate execution time is too long
5653          * and network error could cause from windows client. because
5654          * truncate of some filesystem like FAT32 fill zero data in
5655          * truncated range.
5656          */
5657         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5658                 ksmbd_debug(SMB, "filename : %s truncated to newsize %lld\n",
5659                             fp->filename, newsize);
5660                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5661                 if (rc) {
5662                         ksmbd_debug(SMB, "truncate failed! filename : %s err %d\n",
5663                                     fp->filename, rc);
5664                         if (rc != -EAGAIN)
5665                                 rc = -EBADF;
5666                         return rc;
5667                 }
5668         }
5669         return 0;
5670 }
5671
5672 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5673                            struct smb2_file_rename_info *rename_info,
5674                            unsigned int buf_len)
5675 {
5676         struct user_namespace *user_ns;
5677         struct ksmbd_file *parent_fp;
5678         struct dentry *parent;
5679         struct dentry *dentry = fp->filp->f_path.dentry;
5680         int ret;
5681
5682         if (!(fp->daccess & FILE_DELETE_LE)) {
5683                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5684                 return -EACCES;
5685         }
5686
5687         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5688                         le32_to_cpu(rename_info->FileNameLength))
5689                 return -EINVAL;
5690
5691         user_ns = file_mnt_user_ns(fp->filp);
5692         if (ksmbd_stream_fd(fp))
5693                 goto next;
5694
5695         parent = dget_parent(dentry);
5696         ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5697         if (ret) {
5698                 dput(parent);
5699                 return ret;
5700         }
5701
5702         parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5703         inode_unlock(d_inode(parent));
5704         dput(parent);
5705
5706         if (parent_fp) {
5707                 if (parent_fp->daccess & FILE_DELETE_LE) {
5708                         pr_err("parent dir is opened with delete access\n");
5709                         return -ESHARE;
5710                 }
5711         }
5712 next:
5713         return smb2_rename(work, fp, user_ns, rename_info,
5714                            work->sess->conn->local_nls);
5715 }
5716
5717 static int set_file_disposition_info(struct ksmbd_file *fp,
5718                                      struct smb2_file_disposition_info *file_info)
5719 {
5720         struct inode *inode;
5721
5722         if (!(fp->daccess & FILE_DELETE_LE)) {
5723                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5724                 return -EACCES;
5725         }
5726
5727         inode = file_inode(fp->filp);
5728         if (file_info->DeletePending) {
5729                 if (S_ISDIR(inode->i_mode) &&
5730                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5731                         return -EBUSY;
5732                 ksmbd_set_inode_pending_delete(fp);
5733         } else {
5734                 ksmbd_clear_inode_pending_delete(fp);
5735         }
5736         return 0;
5737 }
5738
5739 static int set_file_position_info(struct ksmbd_file *fp,
5740                                   struct smb2_file_pos_info *file_info)
5741 {
5742         loff_t current_byte_offset;
5743         unsigned long sector_size;
5744         struct inode *inode;
5745
5746         inode = file_inode(fp->filp);
5747         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5748         sector_size = inode->i_sb->s_blocksize;
5749
5750         if (current_byte_offset < 0 ||
5751             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5752              current_byte_offset & (sector_size - 1))) {
5753                 pr_err("CurrentByteOffset is not valid : %llu\n",
5754                        current_byte_offset);
5755                 return -EINVAL;
5756         }
5757
5758         fp->filp->f_pos = current_byte_offset;
5759         return 0;
5760 }
5761
5762 static int set_file_mode_info(struct ksmbd_file *fp,
5763                               struct smb2_file_mode_info *file_info)
5764 {
5765         __le32 mode;
5766
5767         mode = file_info->Mode;
5768
5769         if ((mode & ~FILE_MODE_INFO_MASK) ||
5770             (mode & FILE_SYNCHRONOUS_IO_ALERT_LE &&
5771              mode & FILE_SYNCHRONOUS_IO_NONALERT_LE)) {
5772                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5773                 return -EINVAL;
5774         }
5775
5776         /*
5777          * TODO : need to implement consideration for
5778          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5779          */
5780         ksmbd_vfs_set_fadvise(fp->filp, mode);
5781         fp->coption = mode;
5782         return 0;
5783 }
5784
5785 /**
5786  * smb2_set_info_file() - handler for smb2 set info command
5787  * @work:       smb work containing set info command buffer
5788  * @fp:         ksmbd_file pointer
5789  * @info_class: smb2 set info class
5790  * @share:      ksmbd_share_config pointer
5791  *
5792  * Return:      0 on success, otherwise error
5793  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5794  */
5795 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5796                               struct smb2_set_info_req *req,
5797                               struct ksmbd_share_config *share)
5798 {
5799         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5800
5801         switch (req->FileInfoClass) {
5802         case FILE_BASIC_INFORMATION:
5803         {
5804                 if (buf_len < sizeof(struct smb2_file_basic_info))
5805                         return -EINVAL;
5806
5807                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5808         }
5809         case FILE_ALLOCATION_INFORMATION:
5810         {
5811                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5812                         return -EINVAL;
5813
5814                 return set_file_allocation_info(work, fp,
5815                                                 (struct smb2_file_alloc_info *)req->Buffer);
5816         }
5817         case FILE_END_OF_FILE_INFORMATION:
5818         {
5819                 if (buf_len < sizeof(struct smb2_file_eof_info))
5820                         return -EINVAL;
5821
5822                 return set_end_of_file_info(work, fp,
5823                                             (struct smb2_file_eof_info *)req->Buffer);
5824         }
5825         case FILE_RENAME_INFORMATION:
5826         {
5827                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5828                         ksmbd_debug(SMB,
5829                                     "User does not have write permission\n");
5830                         return -EACCES;
5831                 }
5832
5833                 if (buf_len < sizeof(struct smb2_file_rename_info))
5834                         return -EINVAL;
5835
5836                 return set_rename_info(work, fp,
5837                                        (struct smb2_file_rename_info *)req->Buffer,
5838                                        buf_len);
5839         }
5840         case FILE_LINK_INFORMATION:
5841         {
5842                 if (buf_len < sizeof(struct smb2_file_link_info))
5843                         return -EINVAL;
5844
5845                 return smb2_create_link(work, work->tcon->share_conf,
5846                                         (struct smb2_file_link_info *)req->Buffer,
5847                                         buf_len, fp->filp,
5848                                         work->sess->conn->local_nls);
5849         }
5850         case FILE_DISPOSITION_INFORMATION:
5851         {
5852                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5853                         ksmbd_debug(SMB,
5854                                     "User does not have write permission\n");
5855                         return -EACCES;
5856                 }
5857
5858                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5859                         return -EINVAL;
5860
5861                 return set_file_disposition_info(fp,
5862                                                  (struct smb2_file_disposition_info *)req->Buffer);
5863         }
5864         case FILE_FULL_EA_INFORMATION:
5865         {
5866                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5867                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5868                                fp->daccess);
5869                         return -EACCES;
5870                 }
5871
5872                 if (buf_len < sizeof(struct smb2_ea_info))
5873                         return -EINVAL;
5874
5875                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5876                                    buf_len, &fp->filp->f_path);
5877         }
5878         case FILE_POSITION_INFORMATION:
5879         {
5880                 if (buf_len < sizeof(struct smb2_file_pos_info))
5881                         return -EINVAL;
5882
5883                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5884         }
5885         case FILE_MODE_INFORMATION:
5886         {
5887                 if (buf_len < sizeof(struct smb2_file_mode_info))
5888                         return -EINVAL;
5889
5890                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5891         }
5892         }
5893
5894         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
5895         return -EOPNOTSUPP;
5896 }
5897
5898 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
5899                              char *buffer, int buf_len)
5900 {
5901         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
5902
5903         fp->saccess |= FILE_SHARE_DELETE_LE;
5904
5905         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
5906                         buf_len, false);
5907 }
5908
5909 /**
5910  * smb2_set_info() - handler for smb2 set info command handler
5911  * @work:       smb work containing set info request buffer
5912  *
5913  * Return:      0 on success, otherwise error
5914  */
5915 int smb2_set_info(struct ksmbd_work *work)
5916 {
5917         struct smb2_set_info_req *req;
5918         struct smb2_set_info_rsp *rsp, *rsp_org;
5919         struct ksmbd_file *fp;
5920         int rc = 0;
5921         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5922
5923         ksmbd_debug(SMB, "Received set info request\n");
5924
5925         rsp_org = work->response_buf;
5926         if (work->next_smb2_rcv_hdr_off) {
5927                 req = ksmbd_req_buf_next(work);
5928                 rsp = ksmbd_resp_buf_next(work);
5929                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5930                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5931                                     work->compound_fid);
5932                         id = work->compound_fid;
5933                         pid = work->compound_pfid;
5934                 }
5935         } else {
5936                 req = work->request_buf;
5937                 rsp = work->response_buf;
5938         }
5939
5940         if (!has_file_id(id)) {
5941                 id = le64_to_cpu(req->VolatileFileId);
5942                 pid = le64_to_cpu(req->PersistentFileId);
5943         }
5944
5945         fp = ksmbd_lookup_fd_slow(work, id, pid);
5946         if (!fp) {
5947                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
5948                 rc = -ENOENT;
5949                 goto err_out;
5950         }
5951
5952         switch (req->InfoType) {
5953         case SMB2_O_INFO_FILE:
5954                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5955                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
5956                 break;
5957         case SMB2_O_INFO_SECURITY:
5958                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5959                 if (ksmbd_override_fsids(work)) {
5960                         rc = -ENOMEM;
5961                         goto err_out;
5962                 }
5963                 rc = smb2_set_info_sec(fp,
5964                                        le32_to_cpu(req->AdditionalInformation),
5965                                        req->Buffer,
5966                                        le32_to_cpu(req->BufferLength));
5967                 ksmbd_revert_fsids(work);
5968                 break;
5969         default:
5970                 rc = -EOPNOTSUPP;
5971         }
5972
5973         if (rc < 0)
5974                 goto err_out;
5975
5976         rsp->StructureSize = cpu_to_le16(2);
5977         inc_rfc1001_len(rsp_org, 2);
5978         ksmbd_fd_put(work, fp);
5979         return 0;
5980
5981 err_out:
5982         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
5983                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5984         else if (rc == -EINVAL)
5985                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5986         else if (rc == -ESHARE)
5987                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
5988         else if (rc == -ENOENT)
5989                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
5990         else if (rc == -EBUSY || rc == -ENOTEMPTY)
5991                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
5992         else if (rc == -EAGAIN)
5993                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
5994         else if (rc == -EBADF || rc == -ESTALE)
5995                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
5996         else if (rc == -EEXIST)
5997                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
5998         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
5999                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6000         smb2_set_err_rsp(work);
6001         ksmbd_fd_put(work, fp);
6002         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6003         return rc;
6004 }
6005
6006 /**
6007  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6008  * @work:       smb work containing read IPC pipe command buffer
6009  *
6010  * Return:      0 on success, otherwise error
6011  */
6012 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6013 {
6014         int nbytes = 0, err;
6015         u64 id;
6016         struct ksmbd_rpc_command *rpc_resp;
6017         struct smb2_read_req *req = work->request_buf;
6018         struct smb2_read_rsp *rsp = work->response_buf;
6019
6020         id = le64_to_cpu(req->VolatileFileId);
6021
6022         inc_rfc1001_len(rsp, 16);
6023         rpc_resp = ksmbd_rpc_read(work->sess, id);
6024         if (rpc_resp) {
6025                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6026                         err = -EINVAL;
6027                         goto out;
6028                 }
6029
6030                 work->aux_payload_buf =
6031                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6032                 if (!work->aux_payload_buf) {
6033                         err = -ENOMEM;
6034                         goto out;
6035                 }
6036
6037                 memcpy(work->aux_payload_buf, rpc_resp->payload,
6038                        rpc_resp->payload_sz);
6039
6040                 nbytes = rpc_resp->payload_sz;
6041                 work->resp_hdr_sz = get_rfc1002_len(rsp) + 4;
6042                 work->aux_payload_sz = nbytes;
6043                 kvfree(rpc_resp);
6044         }
6045
6046         rsp->StructureSize = cpu_to_le16(17);
6047         rsp->DataOffset = 80;
6048         rsp->Reserved = 0;
6049         rsp->DataLength = cpu_to_le32(nbytes);
6050         rsp->DataRemaining = 0;
6051         rsp->Reserved2 = 0;
6052         inc_rfc1001_len(rsp, nbytes);
6053         return 0;
6054
6055 out:
6056         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6057         smb2_set_err_rsp(work);
6058         kvfree(rpc_resp);
6059         return err;
6060 }
6061
6062 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6063                                       struct smb2_read_req *req, void *data_buf,
6064                                       size_t length)
6065 {
6066         struct smb2_buffer_desc_v1 *desc =
6067                 (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6068         int err;
6069
6070         if (work->conn->dialect == SMB30_PROT_ID &&
6071             req->Channel != SMB2_CHANNEL_RDMA_V1)
6072                 return -EINVAL;
6073
6074         if (req->ReadChannelInfoOffset == 0 ||
6075             le16_to_cpu(req->ReadChannelInfoLength) < sizeof(*desc))
6076                 return -EINVAL;
6077
6078         work->need_invalidate_rkey =
6079                 (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6080         work->remote_key = le32_to_cpu(desc->token);
6081
6082         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6083                                     le32_to_cpu(desc->token),
6084                                     le64_to_cpu(desc->offset),
6085                                     le32_to_cpu(desc->length));
6086         if (err)
6087                 return err;
6088
6089         return length;
6090 }
6091
6092 /**
6093  * smb2_read() - handler for smb2 read from file
6094  * @work:       smb work containing read command buffer
6095  *
6096  * Return:      0 on success, otherwise error
6097  */
6098 int smb2_read(struct ksmbd_work *work)
6099 {
6100         struct ksmbd_conn *conn = work->conn;
6101         struct smb2_read_req *req;
6102         struct smb2_read_rsp *rsp, *rsp_org;
6103         struct ksmbd_file *fp;
6104         loff_t offset;
6105         size_t length, mincount;
6106         ssize_t nbytes = 0, remain_bytes = 0;
6107         int err = 0;
6108
6109         rsp_org = work->response_buf;
6110         WORK_BUFFERS(work, req, rsp);
6111
6112         if (test_share_config_flag(work->tcon->share_conf,
6113                                    KSMBD_SHARE_FLAG_PIPE)) {
6114                 ksmbd_debug(SMB, "IPC pipe read request\n");
6115                 return smb2_read_pipe(work);
6116         }
6117
6118         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6119                                   le64_to_cpu(req->PersistentFileId));
6120         if (!fp) {
6121                 err = -ENOENT;
6122                 goto out;
6123         }
6124
6125         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6126                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6127                 err = -EACCES;
6128                 goto out;
6129         }
6130
6131         offset = le64_to_cpu(req->Offset);
6132         length = le32_to_cpu(req->Length);
6133         mincount = le32_to_cpu(req->MinimumCount);
6134
6135         if (length > conn->vals->max_read_size) {
6136                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6137                             conn->vals->max_read_size);
6138                 err = -EINVAL;
6139                 goto out;
6140         }
6141
6142         ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6143                     fp->filp->f_path.dentry, offset, length);
6144
6145         work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6146         if (!work->aux_payload_buf) {
6147                 err = -ENOMEM;
6148                 goto out;
6149         }
6150
6151         nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6152         if (nbytes < 0) {
6153                 err = nbytes;
6154                 goto out;
6155         }
6156
6157         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6158                 kvfree(work->aux_payload_buf);
6159                 work->aux_payload_buf = NULL;
6160                 rsp->hdr.Status = STATUS_END_OF_FILE;
6161                 smb2_set_err_rsp(work);
6162                 ksmbd_fd_put(work, fp);
6163                 return 0;
6164         }
6165
6166         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6167                     nbytes, offset, mincount);
6168
6169         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6170             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6171                 /* write data to the client using rdma channel */
6172                 remain_bytes = smb2_read_rdma_channel(work, req,
6173                                                       work->aux_payload_buf,
6174                                                       nbytes);
6175                 kvfree(work->aux_payload_buf);
6176                 work->aux_payload_buf = NULL;
6177
6178                 nbytes = 0;
6179                 if (remain_bytes < 0) {
6180                         err = (int)remain_bytes;
6181                         goto out;
6182                 }
6183         }
6184
6185         rsp->StructureSize = cpu_to_le16(17);
6186         rsp->DataOffset = 80;
6187         rsp->Reserved = 0;
6188         rsp->DataLength = cpu_to_le32(nbytes);
6189         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6190         rsp->Reserved2 = 0;
6191         inc_rfc1001_len(rsp_org, 16);
6192         work->resp_hdr_sz = get_rfc1002_len(rsp_org) + 4;
6193         work->aux_payload_sz = nbytes;
6194         inc_rfc1001_len(rsp_org, nbytes);
6195         ksmbd_fd_put(work, fp);
6196         return 0;
6197
6198 out:
6199         if (err) {
6200                 if (err == -EISDIR)
6201                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6202                 else if (err == -EAGAIN)
6203                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6204                 else if (err == -ENOENT)
6205                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6206                 else if (err == -EACCES)
6207                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6208                 else if (err == -ESHARE)
6209                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6210                 else if (err == -EINVAL)
6211                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6212                 else
6213                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6214
6215                 smb2_set_err_rsp(work);
6216         }
6217         ksmbd_fd_put(work, fp);
6218         return err;
6219 }
6220
6221 /**
6222  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6223  * @work:       smb work containing write IPC pipe command buffer
6224  *
6225  * Return:      0 on success, otherwise error
6226  */
6227 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6228 {
6229         struct smb2_write_req *req = work->request_buf;
6230         struct smb2_write_rsp *rsp = work->response_buf;
6231         struct ksmbd_rpc_command *rpc_resp;
6232         u64 id = 0;
6233         int err = 0, ret = 0;
6234         char *data_buf;
6235         size_t length;
6236
6237         length = le32_to_cpu(req->Length);
6238         id = le64_to_cpu(req->VolatileFileId);
6239
6240         if (le16_to_cpu(req->DataOffset) ==
6241             (offsetof(struct smb2_write_req, Buffer) - 4)) {
6242                 data_buf = (char *)&req->Buffer[0];
6243         } else {
6244                 if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
6245                     (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
6246                         pr_err("invalid write data offset %u, smb_len %u\n",
6247                                le16_to_cpu(req->DataOffset),
6248                                get_rfc1002_len(req));
6249                         err = -EINVAL;
6250                         goto out;
6251                 }
6252
6253                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6254                                 le16_to_cpu(req->DataOffset));
6255         }
6256
6257         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6258         if (rpc_resp) {
6259                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6260                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6261                         kvfree(rpc_resp);
6262                         smb2_set_err_rsp(work);
6263                         return -EOPNOTSUPP;
6264                 }
6265                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6266                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6267                         smb2_set_err_rsp(work);
6268                         kvfree(rpc_resp);
6269                         return ret;
6270                 }
6271                 kvfree(rpc_resp);
6272         }
6273
6274         rsp->StructureSize = cpu_to_le16(17);
6275         rsp->DataOffset = 0;
6276         rsp->Reserved = 0;
6277         rsp->DataLength = cpu_to_le32(length);
6278         rsp->DataRemaining = 0;
6279         rsp->Reserved2 = 0;
6280         inc_rfc1001_len(rsp, 16);
6281         return 0;
6282 out:
6283         if (err) {
6284                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6285                 smb2_set_err_rsp(work);
6286         }
6287
6288         return err;
6289 }
6290
6291 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6292                                        struct smb2_write_req *req,
6293                                        struct ksmbd_file *fp,
6294                                        loff_t offset, size_t length, bool sync)
6295 {
6296         struct smb2_buffer_desc_v1 *desc;
6297         char *data_buf;
6298         int ret;
6299         ssize_t nbytes;
6300
6301         desc = (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6302
6303         if (work->conn->dialect == SMB30_PROT_ID &&
6304             req->Channel != SMB2_CHANNEL_RDMA_V1)
6305                 return -EINVAL;
6306
6307         if (req->Length != 0 || req->DataOffset != 0)
6308                 return -EINVAL;
6309
6310         if (req->WriteChannelInfoOffset == 0 ||
6311             le16_to_cpu(req->WriteChannelInfoLength) < sizeof(*desc))
6312                 return -EINVAL;
6313
6314         work->need_invalidate_rkey =
6315                 (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6316         work->remote_key = le32_to_cpu(desc->token);
6317
6318         data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6319         if (!data_buf)
6320                 return -ENOMEM;
6321
6322         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6323                                    le32_to_cpu(desc->token),
6324                                    le64_to_cpu(desc->offset),
6325                                    le32_to_cpu(desc->length));
6326         if (ret < 0) {
6327                 kvfree(data_buf);
6328                 return ret;
6329         }
6330
6331         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6332         kvfree(data_buf);
6333         if (ret < 0)
6334                 return ret;
6335
6336         return nbytes;
6337 }
6338
6339 /**
6340  * smb2_write() - handler for smb2 write from file
6341  * @work:       smb work containing write command buffer
6342  *
6343  * Return:      0 on success, otherwise error
6344  */
6345 int smb2_write(struct ksmbd_work *work)
6346 {
6347         struct smb2_write_req *req;
6348         struct smb2_write_rsp *rsp, *rsp_org;
6349         struct ksmbd_file *fp = NULL;
6350         loff_t offset;
6351         size_t length;
6352         ssize_t nbytes;
6353         char *data_buf;
6354         bool writethrough = false;
6355         int err = 0;
6356
6357         rsp_org = work->response_buf;
6358         WORK_BUFFERS(work, req, rsp);
6359
6360         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6361                 ksmbd_debug(SMB, "IPC pipe write request\n");
6362                 return smb2_write_pipe(work);
6363         }
6364
6365         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6366                 ksmbd_debug(SMB, "User does not have write permission\n");
6367                 err = -EACCES;
6368                 goto out;
6369         }
6370
6371         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6372                                   le64_to_cpu(req->PersistentFileId));
6373         if (!fp) {
6374                 err = -ENOENT;
6375                 goto out;
6376         }
6377
6378         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6379                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6380                 err = -EACCES;
6381                 goto out;
6382         }
6383
6384         offset = le64_to_cpu(req->Offset);
6385         length = le32_to_cpu(req->Length);
6386
6387         if (length > work->conn->vals->max_write_size) {
6388                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6389                             work->conn->vals->max_write_size);
6390                 err = -EINVAL;
6391                 goto out;
6392         }
6393
6394         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6395                 writethrough = true;
6396
6397         if (req->Channel != SMB2_CHANNEL_RDMA_V1 &&
6398             req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6399                 if (le16_to_cpu(req->DataOffset) ==
6400                     (offsetof(struct smb2_write_req, Buffer) - 4)) {
6401                         data_buf = (char *)&req->Buffer[0];
6402                 } else {
6403                         if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
6404                             (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
6405                                 pr_err("invalid write data offset %u, smb_len %u\n",
6406                                        le16_to_cpu(req->DataOffset),
6407                                        get_rfc1002_len(req));
6408                                 err = -EINVAL;
6409                                 goto out;
6410                         }
6411
6412                         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6413                                         le16_to_cpu(req->DataOffset));
6414                 }
6415
6416                 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6417                 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6418                         writethrough = true;
6419
6420                 ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6421                             fp->filp->f_path.dentry, offset, length);
6422                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6423                                       writethrough, &nbytes);
6424                 if (err < 0)
6425                         goto out;
6426         } else {
6427                 /* read data from the client using rdma channel, and
6428                  * write the data.
6429                  */
6430                 nbytes = smb2_write_rdma_channel(work, req, fp, offset,
6431                                                  le32_to_cpu(req->RemainingBytes),
6432                                                  writethrough);
6433                 if (nbytes < 0) {
6434                         err = (int)nbytes;
6435                         goto out;
6436                 }
6437         }
6438
6439         rsp->StructureSize = cpu_to_le16(17);
6440         rsp->DataOffset = 0;
6441         rsp->Reserved = 0;
6442         rsp->DataLength = cpu_to_le32(nbytes);
6443         rsp->DataRemaining = 0;
6444         rsp->Reserved2 = 0;
6445         inc_rfc1001_len(rsp_org, 16);
6446         ksmbd_fd_put(work, fp);
6447         return 0;
6448
6449 out:
6450         if (err == -EAGAIN)
6451                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6452         else if (err == -ENOSPC || err == -EFBIG)
6453                 rsp->hdr.Status = STATUS_DISK_FULL;
6454         else if (err == -ENOENT)
6455                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6456         else if (err == -EACCES)
6457                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6458         else if (err == -ESHARE)
6459                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6460         else if (err == -EINVAL)
6461                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6462         else
6463                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6464
6465         smb2_set_err_rsp(work);
6466         ksmbd_fd_put(work, fp);
6467         return err;
6468 }
6469
6470 /**
6471  * smb2_flush() - handler for smb2 flush file - fsync
6472  * @work:       smb work containing flush command buffer
6473  *
6474  * Return:      0 on success, otherwise error
6475  */
6476 int smb2_flush(struct ksmbd_work *work)
6477 {
6478         struct smb2_flush_req *req;
6479         struct smb2_flush_rsp *rsp, *rsp_org;
6480         int err;
6481
6482         rsp_org = work->response_buf;
6483         WORK_BUFFERS(work, req, rsp);
6484
6485         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n",
6486                     le64_to_cpu(req->VolatileFileId));
6487
6488         err = ksmbd_vfs_fsync(work,
6489                               le64_to_cpu(req->VolatileFileId),
6490                               le64_to_cpu(req->PersistentFileId));
6491         if (err)
6492                 goto out;
6493
6494         rsp->StructureSize = cpu_to_le16(4);
6495         rsp->Reserved = 0;
6496         inc_rfc1001_len(rsp_org, 4);
6497         return 0;
6498
6499 out:
6500         if (err) {
6501                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6502                 smb2_set_err_rsp(work);
6503         }
6504
6505         return err;
6506 }
6507
6508 /**
6509  * smb2_cancel() - handler for smb2 cancel command
6510  * @work:       smb work containing cancel command buffer
6511  *
6512  * Return:      0 on success, otherwise error
6513  */
6514 int smb2_cancel(struct ksmbd_work *work)
6515 {
6516         struct ksmbd_conn *conn = work->conn;
6517         struct smb2_hdr *hdr = work->request_buf;
6518         struct smb2_hdr *chdr;
6519         struct ksmbd_work *cancel_work = NULL;
6520         int canceled = 0;
6521         struct list_head *command_list;
6522
6523         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6524                     hdr->MessageId, hdr->Flags);
6525
6526         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6527                 command_list = &conn->async_requests;
6528
6529                 spin_lock(&conn->request_lock);
6530                 list_for_each_entry(cancel_work, command_list,
6531                                     async_request_entry) {
6532                         chdr = cancel_work->request_buf;
6533
6534                         if (cancel_work->async_id !=
6535                             le64_to_cpu(hdr->Id.AsyncId))
6536                                 continue;
6537
6538                         ksmbd_debug(SMB,
6539                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6540                                     le64_to_cpu(hdr->Id.AsyncId),
6541                                     le16_to_cpu(chdr->Command));
6542                         canceled = 1;
6543                         break;
6544                 }
6545                 spin_unlock(&conn->request_lock);
6546         } else {
6547                 command_list = &conn->requests;
6548
6549                 spin_lock(&conn->request_lock);
6550                 list_for_each_entry(cancel_work, command_list, request_entry) {
6551                         chdr = cancel_work->request_buf;
6552
6553                         if (chdr->MessageId != hdr->MessageId ||
6554                             cancel_work == work)
6555                                 continue;
6556
6557                         ksmbd_debug(SMB,
6558                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6559                                     le64_to_cpu(hdr->MessageId),
6560                                     le16_to_cpu(chdr->Command));
6561                         canceled = 1;
6562                         break;
6563                 }
6564                 spin_unlock(&conn->request_lock);
6565         }
6566
6567         if (canceled) {
6568                 cancel_work->state = KSMBD_WORK_CANCELLED;
6569                 if (cancel_work->cancel_fn)
6570                         cancel_work->cancel_fn(cancel_work->cancel_argv);
6571         }
6572
6573         /* For SMB2_CANCEL command itself send no response*/
6574         work->send_no_response = 1;
6575         return 0;
6576 }
6577
6578 struct file_lock *smb_flock_init(struct file *f)
6579 {
6580         struct file_lock *fl;
6581
6582         fl = locks_alloc_lock();
6583         if (!fl)
6584                 goto out;
6585
6586         locks_init_lock(fl);
6587
6588         fl->fl_owner = f;
6589         fl->fl_pid = current->tgid;
6590         fl->fl_file = f;
6591         fl->fl_flags = FL_POSIX;
6592         fl->fl_ops = NULL;
6593         fl->fl_lmops = NULL;
6594
6595 out:
6596         return fl;
6597 }
6598
6599 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6600 {
6601         int cmd = -EINVAL;
6602
6603         /* Checking for wrong flag combination during lock request*/
6604         switch (flags) {
6605         case SMB2_LOCKFLAG_SHARED:
6606                 ksmbd_debug(SMB, "received shared request\n");
6607                 cmd = F_SETLKW;
6608                 flock->fl_type = F_RDLCK;
6609                 flock->fl_flags |= FL_SLEEP;
6610                 break;
6611         case SMB2_LOCKFLAG_EXCLUSIVE:
6612                 ksmbd_debug(SMB, "received exclusive request\n");
6613                 cmd = F_SETLKW;
6614                 flock->fl_type = F_WRLCK;
6615                 flock->fl_flags |= FL_SLEEP;
6616                 break;
6617         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6618                 ksmbd_debug(SMB,
6619                             "received shared & fail immediately request\n");
6620                 cmd = F_SETLK;
6621                 flock->fl_type = F_RDLCK;
6622                 break;
6623         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6624                 ksmbd_debug(SMB,
6625                             "received exclusive & fail immediately request\n");
6626                 cmd = F_SETLK;
6627                 flock->fl_type = F_WRLCK;
6628                 break;
6629         case SMB2_LOCKFLAG_UNLOCK:
6630                 ksmbd_debug(SMB, "received unlock request\n");
6631                 flock->fl_type = F_UNLCK;
6632                 cmd = 0;
6633                 break;
6634         }
6635
6636         return cmd;
6637 }
6638
6639 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6640                                          unsigned int cmd, int flags,
6641                                          struct list_head *lock_list)
6642 {
6643         struct ksmbd_lock *lock;
6644
6645         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6646         if (!lock)
6647                 return NULL;
6648
6649         lock->cmd = cmd;
6650         lock->fl = flock;
6651         lock->start = flock->fl_start;
6652         lock->end = flock->fl_end;
6653         lock->flags = flags;
6654         if (lock->start == lock->end)
6655                 lock->zero_len = 1;
6656         INIT_LIST_HEAD(&lock->clist);
6657         INIT_LIST_HEAD(&lock->flist);
6658         INIT_LIST_HEAD(&lock->llist);
6659         list_add_tail(&lock->llist, lock_list);
6660
6661         return lock;
6662 }
6663
6664 static void smb2_remove_blocked_lock(void **argv)
6665 {
6666         struct file_lock *flock = (struct file_lock *)argv[0];
6667
6668         ksmbd_vfs_posix_lock_unblock(flock);
6669         wake_up(&flock->fl_wait);
6670 }
6671
6672 static inline bool lock_defer_pending(struct file_lock *fl)
6673 {
6674         /* check pending lock waiters */
6675         return waitqueue_active(&fl->fl_wait);
6676 }
6677
6678 /**
6679  * smb2_lock() - handler for smb2 file lock command
6680  * @work:       smb work containing lock command buffer
6681  *
6682  * Return:      0 on success, otherwise error
6683  */
6684 int smb2_lock(struct ksmbd_work *work)
6685 {
6686         struct smb2_lock_req *req = work->request_buf;
6687         struct smb2_lock_rsp *rsp = work->response_buf;
6688         struct smb2_lock_element *lock_ele;
6689         struct ksmbd_file *fp = NULL;
6690         struct file_lock *flock = NULL;
6691         struct file *filp = NULL;
6692         int lock_count;
6693         int flags = 0;
6694         int cmd = 0;
6695         int err = -EIO, i, rc = 0;
6696         u64 lock_start, lock_length;
6697         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6698         struct ksmbd_conn *conn;
6699         int nolock = 0;
6700         LIST_HEAD(lock_list);
6701         LIST_HEAD(rollback_list);
6702         int prior_lock = 0;
6703
6704         ksmbd_debug(SMB, "Received lock request\n");
6705         fp = ksmbd_lookup_fd_slow(work,
6706                                   le64_to_cpu(req->VolatileFileId),
6707                                   le64_to_cpu(req->PersistentFileId));
6708         if (!fp) {
6709                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n",
6710                             le64_to_cpu(req->VolatileFileId));
6711                 err = -ENOENT;
6712                 goto out2;
6713         }
6714
6715         filp = fp->filp;
6716         lock_count = le16_to_cpu(req->LockCount);
6717         lock_ele = req->locks;
6718
6719         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6720         if (!lock_count) {
6721                 err = -EINVAL;
6722                 goto out2;
6723         }
6724
6725         for (i = 0; i < lock_count; i++) {
6726                 flags = le32_to_cpu(lock_ele[i].Flags);
6727
6728                 flock = smb_flock_init(filp);
6729                 if (!flock)
6730                         goto out;
6731
6732                 cmd = smb2_set_flock_flags(flock, flags);
6733
6734                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6735                 lock_length = le64_to_cpu(lock_ele[i].Length);
6736                 if (lock_start > U64_MAX - lock_length) {
6737                         pr_err("Invalid lock range requested\n");
6738                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6739                         goto out;
6740                 }
6741
6742                 if (lock_start > OFFSET_MAX)
6743                         flock->fl_start = OFFSET_MAX;
6744                 else
6745                         flock->fl_start = lock_start;
6746
6747                 lock_length = le64_to_cpu(lock_ele[i].Length);
6748                 if (lock_length > OFFSET_MAX - flock->fl_start)
6749                         lock_length = OFFSET_MAX - flock->fl_start;
6750
6751                 flock->fl_end = flock->fl_start + lock_length;
6752
6753                 if (flock->fl_end < flock->fl_start) {
6754                         ksmbd_debug(SMB,
6755                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6756                                     flock->fl_end, flock->fl_start);
6757                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6758                         goto out;
6759                 }
6760
6761                 /* Check conflict locks in one request */
6762                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6763                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6764                             cmp_lock->fl->fl_end >= flock->fl_end) {
6765                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6766                                     flock->fl_type != F_UNLCK) {
6767                                         pr_err("conflict two locks in one request\n");
6768                                         err = -EINVAL;
6769                                         goto out;
6770                                 }
6771                         }
6772                 }
6773
6774                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6775                 if (!smb_lock) {
6776                         err = -EINVAL;
6777                         goto out;
6778                 }
6779         }
6780
6781         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6782                 if (smb_lock->cmd < 0) {
6783                         err = -EINVAL;
6784                         goto out;
6785                 }
6786
6787                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6788                         err = -EINVAL;
6789                         goto out;
6790                 }
6791
6792                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6793                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6794                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6795                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6796                         err = -EINVAL;
6797                         goto out;
6798                 }
6799
6800                 prior_lock = smb_lock->flags;
6801
6802                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6803                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6804                         goto no_check_cl;
6805
6806                 nolock = 1;
6807                 /* check locks in connection list */
6808                 read_lock(&conn_list_lock);
6809                 list_for_each_entry(conn, &conn_list, conns_list) {
6810                         spin_lock(&conn->llist_lock);
6811                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6812                                 if (file_inode(cmp_lock->fl->fl_file) !=
6813                                     file_inode(smb_lock->fl->fl_file))
6814                                         continue;
6815
6816                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6817                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6818                                             cmp_lock->start == smb_lock->start &&
6819                                             cmp_lock->end == smb_lock->end &&
6820                                             !lock_defer_pending(cmp_lock->fl)) {
6821                                                 nolock = 0;
6822                                                 list_del(&cmp_lock->flist);
6823                                                 list_del(&cmp_lock->clist);
6824                                                 spin_unlock(&conn->llist_lock);
6825                                                 read_unlock(&conn_list_lock);
6826
6827                                                 locks_free_lock(cmp_lock->fl);
6828                                                 kfree(cmp_lock);
6829                                                 goto out_check_cl;
6830                                         }
6831                                         continue;
6832                                 }
6833
6834                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6835                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6836                                                 continue;
6837                                 } else {
6838                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6839                                                 continue;
6840                                 }
6841
6842                                 /* check zero byte lock range */
6843                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6844                                     cmp_lock->start > smb_lock->start &&
6845                                     cmp_lock->start < smb_lock->end) {
6846                                         spin_unlock(&conn->llist_lock);
6847                                         read_unlock(&conn_list_lock);
6848                                         pr_err("previous lock conflict with zero byte lock range\n");
6849                                         goto out;
6850                                 }
6851
6852                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6853                                     smb_lock->start > cmp_lock->start &&
6854                                     smb_lock->start < cmp_lock->end) {
6855                                         spin_unlock(&conn->llist_lock);
6856                                         read_unlock(&conn_list_lock);
6857                                         pr_err("current lock conflict with zero byte lock range\n");
6858                                         goto out;
6859                                 }
6860
6861                                 if (((cmp_lock->start <= smb_lock->start &&
6862                                       cmp_lock->end > smb_lock->start) ||
6863                                      (cmp_lock->start < smb_lock->end &&
6864                                       cmp_lock->end >= smb_lock->end)) &&
6865                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6866                                         spin_unlock(&conn->llist_lock);
6867                                         read_unlock(&conn_list_lock);
6868                                         pr_err("Not allow lock operation on exclusive lock range\n");
6869                                         goto out;
6870                                 }
6871                         }
6872                         spin_unlock(&conn->llist_lock);
6873                 }
6874                 read_unlock(&conn_list_lock);
6875 out_check_cl:
6876                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
6877                         pr_err("Try to unlock nolocked range\n");
6878                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
6879                         goto out;
6880                 }
6881
6882 no_check_cl:
6883                 if (smb_lock->zero_len) {
6884                         err = 0;
6885                         goto skip;
6886                 }
6887
6888                 flock = smb_lock->fl;
6889                 list_del(&smb_lock->llist);
6890 retry:
6891                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
6892 skip:
6893                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
6894                         if (!rc) {
6895                                 ksmbd_debug(SMB, "File unlocked\n");
6896                         } else if (rc == -ENOENT) {
6897                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
6898                                 goto out;
6899                         }
6900                         locks_free_lock(flock);
6901                         kfree(smb_lock);
6902                 } else {
6903                         if (rc == FILE_LOCK_DEFERRED) {
6904                                 void **argv;
6905
6906                                 ksmbd_debug(SMB,
6907                                             "would have to wait for getting lock\n");
6908                                 spin_lock(&work->conn->llist_lock);
6909                                 list_add_tail(&smb_lock->clist,
6910                                               &work->conn->lock_list);
6911                                 spin_unlock(&work->conn->llist_lock);
6912                                 list_add(&smb_lock->llist, &rollback_list);
6913
6914                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
6915                                 if (!argv) {
6916                                         err = -ENOMEM;
6917                                         goto out;
6918                                 }
6919                                 argv[0] = flock;
6920
6921                                 rc = setup_async_work(work,
6922                                                       smb2_remove_blocked_lock,
6923                                                       argv);
6924                                 if (rc) {
6925                                         err = -ENOMEM;
6926                                         goto out;
6927                                 }
6928                                 spin_lock(&fp->f_lock);
6929                                 list_add(&work->fp_entry, &fp->blocked_works);
6930                                 spin_unlock(&fp->f_lock);
6931
6932                                 smb2_send_interim_resp(work, STATUS_PENDING);
6933
6934                                 ksmbd_vfs_posix_lock_wait(flock);
6935
6936                                 if (work->state != KSMBD_WORK_ACTIVE) {
6937                                         list_del(&smb_lock->llist);
6938                                         spin_lock(&work->conn->llist_lock);
6939                                         list_del(&smb_lock->clist);
6940                                         spin_unlock(&work->conn->llist_lock);
6941                                         locks_free_lock(flock);
6942
6943                                         if (work->state == KSMBD_WORK_CANCELLED) {
6944                                                 spin_lock(&fp->f_lock);
6945                                                 list_del(&work->fp_entry);
6946                                                 spin_unlock(&fp->f_lock);
6947                                                 rsp->hdr.Status =
6948                                                         STATUS_CANCELLED;
6949                                                 kfree(smb_lock);
6950                                                 smb2_send_interim_resp(work,
6951                                                                        STATUS_CANCELLED);
6952                                                 work->send_no_response = 1;
6953                                                 goto out;
6954                                         }
6955                                         init_smb2_rsp_hdr(work);
6956                                         smb2_set_err_rsp(work);
6957                                         rsp->hdr.Status =
6958                                                 STATUS_RANGE_NOT_LOCKED;
6959                                         kfree(smb_lock);
6960                                         goto out2;
6961                                 }
6962
6963                                 list_del(&smb_lock->llist);
6964                                 spin_lock(&work->conn->llist_lock);
6965                                 list_del(&smb_lock->clist);
6966                                 spin_unlock(&work->conn->llist_lock);
6967
6968                                 spin_lock(&fp->f_lock);
6969                                 list_del(&work->fp_entry);
6970                                 spin_unlock(&fp->f_lock);
6971                                 goto retry;
6972                         } else if (!rc) {
6973                                 spin_lock(&work->conn->llist_lock);
6974                                 list_add_tail(&smb_lock->clist,
6975                                               &work->conn->lock_list);
6976                                 list_add_tail(&smb_lock->flist,
6977                                               &fp->lock_list);
6978                                 spin_unlock(&work->conn->llist_lock);
6979                                 list_add(&smb_lock->llist, &rollback_list);
6980                                 ksmbd_debug(SMB, "successful in taking lock\n");
6981                         } else {
6982                                 goto out;
6983                         }
6984                 }
6985         }
6986
6987         if (atomic_read(&fp->f_ci->op_count) > 1)
6988                 smb_break_all_oplock(work, fp);
6989
6990         rsp->StructureSize = cpu_to_le16(4);
6991         ksmbd_debug(SMB, "successful in taking lock\n");
6992         rsp->hdr.Status = STATUS_SUCCESS;
6993         rsp->Reserved = 0;
6994         inc_rfc1001_len(rsp, 4);
6995         ksmbd_fd_put(work, fp);
6996         return 0;
6997
6998 out:
6999         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7000                 locks_free_lock(smb_lock->fl);
7001                 list_del(&smb_lock->llist);
7002                 kfree(smb_lock);
7003         }
7004
7005         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7006                 struct file_lock *rlock = NULL;
7007
7008                 rlock = smb_flock_init(filp);
7009                 rlock->fl_type = F_UNLCK;
7010                 rlock->fl_start = smb_lock->start;
7011                 rlock->fl_end = smb_lock->end;
7012
7013                 rc = vfs_lock_file(filp, 0, rlock, NULL);
7014                 if (rc)
7015                         pr_err("rollback unlock fail : %d\n", rc);
7016
7017                 list_del(&smb_lock->llist);
7018                 spin_lock(&work->conn->llist_lock);
7019                 if (!list_empty(&smb_lock->flist))
7020                         list_del(&smb_lock->flist);
7021                 list_del(&smb_lock->clist);
7022                 spin_unlock(&work->conn->llist_lock);
7023
7024                 locks_free_lock(smb_lock->fl);
7025                 locks_free_lock(rlock);
7026                 kfree(smb_lock);
7027         }
7028 out2:
7029         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7030
7031         if (!rsp->hdr.Status) {
7032                 if (err == -EINVAL)
7033                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7034                 else if (err == -ENOMEM)
7035                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7036                 else if (err == -ENOENT)
7037                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7038                 else
7039                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7040         }
7041
7042         smb2_set_err_rsp(work);
7043         ksmbd_fd_put(work, fp);
7044         return err;
7045 }
7046
7047 static int fsctl_copychunk(struct ksmbd_work *work, struct smb2_ioctl_req *req,
7048                            struct smb2_ioctl_rsp *rsp)
7049 {
7050         struct copychunk_ioctl_req *ci_req;
7051         struct copychunk_ioctl_rsp *ci_rsp;
7052         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7053         struct srv_copychunk *chunks;
7054         unsigned int i, chunk_count, chunk_count_written = 0;
7055         unsigned int chunk_size_written = 0;
7056         loff_t total_size_written = 0;
7057         int ret, cnt_code;
7058
7059         cnt_code = le32_to_cpu(req->CntCode);
7060         ci_req = (struct copychunk_ioctl_req *)&req->Buffer[0];
7061         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7062
7063         rsp->VolatileFileId = req->VolatileFileId;
7064         rsp->PersistentFileId = req->PersistentFileId;
7065         ci_rsp->ChunksWritten =
7066                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7067         ci_rsp->ChunkBytesWritten =
7068                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7069         ci_rsp->TotalBytesWritten =
7070                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7071
7072         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7073         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7074         total_size_written = 0;
7075
7076         /* verify the SRV_COPYCHUNK_COPY packet */
7077         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7078             le32_to_cpu(req->InputCount) <
7079              offsetof(struct copychunk_ioctl_req, Chunks) +
7080              chunk_count * sizeof(struct srv_copychunk)) {
7081                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7082                 return -EINVAL;
7083         }
7084
7085         for (i = 0; i < chunk_count; i++) {
7086                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7087                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7088                         break;
7089                 total_size_written += le32_to_cpu(chunks[i].Length);
7090         }
7091
7092         if (i < chunk_count ||
7093             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7094                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7095                 return -EINVAL;
7096         }
7097
7098         src_fp = ksmbd_lookup_foreign_fd(work,
7099                                          le64_to_cpu(ci_req->ResumeKey[0]));
7100         dst_fp = ksmbd_lookup_fd_slow(work,
7101                                       le64_to_cpu(req->VolatileFileId),
7102                                       le64_to_cpu(req->PersistentFileId));
7103         ret = -EINVAL;
7104         if (!src_fp ||
7105             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7106                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7107                 goto out;
7108         }
7109
7110         if (!dst_fp) {
7111                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7112                 goto out;
7113         }
7114
7115         /*
7116          * FILE_READ_DATA should only be included in
7117          * the FSCTL_COPYCHUNK case
7118          */
7119         if (cnt_code == FSCTL_COPYCHUNK &&
7120             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7121                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7122                 goto out;
7123         }
7124
7125         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7126                                          chunks, chunk_count,
7127                                          &chunk_count_written,
7128                                          &chunk_size_written,
7129                                          &total_size_written);
7130         if (ret < 0) {
7131                 if (ret == -EACCES)
7132                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7133                 if (ret == -EAGAIN)
7134                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7135                 else if (ret == -EBADF)
7136                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7137                 else if (ret == -EFBIG || ret == -ENOSPC)
7138                         rsp->hdr.Status = STATUS_DISK_FULL;
7139                 else if (ret == -EINVAL)
7140                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7141                 else if (ret == -EISDIR)
7142                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7143                 else if (ret == -E2BIG)
7144                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7145                 else
7146                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7147         }
7148
7149         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7150         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7151         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7152 out:
7153         ksmbd_fd_put(work, src_fp);
7154         ksmbd_fd_put(work, dst_fp);
7155         return ret;
7156 }
7157
7158 static __be32 idev_ipv4_address(struct in_device *idev)
7159 {
7160         __be32 addr = 0;
7161
7162         struct in_ifaddr *ifa;
7163
7164         rcu_read_lock();
7165         in_dev_for_each_ifa_rcu(ifa, idev) {
7166                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7167                         continue;
7168
7169                 addr = ifa->ifa_address;
7170                 break;
7171         }
7172         rcu_read_unlock();
7173         return addr;
7174 }
7175
7176 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7177                                         struct smb2_ioctl_req *req,
7178                                         struct smb2_ioctl_rsp *rsp)
7179 {
7180         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7181         int nbytes = 0;
7182         struct net_device *netdev;
7183         struct sockaddr_storage_rsp *sockaddr_storage;
7184         unsigned int flags;
7185         unsigned long long speed;
7186         struct sockaddr_in6 *csin6 = (struct sockaddr_in6 *)&conn->peer_addr;
7187
7188         rtnl_lock();
7189         for_each_netdev(&init_net, netdev) {
7190                 if (netdev->type == ARPHRD_LOOPBACK)
7191                         continue;
7192
7193                 flags = dev_get_flags(netdev);
7194                 if (!(flags & IFF_RUNNING))
7195                         continue;
7196
7197                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7198                                 &rsp->Buffer[nbytes];
7199                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7200
7201                 nii_rsp->Capability = 0;
7202                 if (ksmbd_rdma_capable_netdev(netdev))
7203                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7204
7205                 nii_rsp->Next = cpu_to_le32(152);
7206                 nii_rsp->Reserved = 0;
7207
7208                 if (netdev->ethtool_ops->get_link_ksettings) {
7209                         struct ethtool_link_ksettings cmd;
7210
7211                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7212                         speed = cmd.base.speed;
7213                 } else {
7214                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7215                                     "speed is unknown, defaulting to 1Gb/sec");
7216                         speed = SPEED_1000;
7217                 }
7218
7219                 speed *= 1000000;
7220                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7221
7222                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7223                                         nii_rsp->SockAddr_Storage;
7224                 memset(sockaddr_storage, 0, 128);
7225
7226                 if (conn->peer_addr.ss_family == PF_INET ||
7227                     ipv6_addr_v4mapped(&csin6->sin6_addr)) {
7228                         struct in_device *idev;
7229
7230                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7231                         sockaddr_storage->addr4.Port = 0;
7232
7233                         idev = __in_dev_get_rtnl(netdev);
7234                         if (!idev)
7235                                 continue;
7236                         sockaddr_storage->addr4.IPv4address =
7237                                                 idev_ipv4_address(idev);
7238                 } else {
7239                         struct inet6_dev *idev6;
7240                         struct inet6_ifaddr *ifa;
7241                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7242
7243                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7244                         sockaddr_storage->addr6.Port = 0;
7245                         sockaddr_storage->addr6.FlowInfo = 0;
7246
7247                         idev6 = __in6_dev_get(netdev);
7248                         if (!idev6)
7249                                 continue;
7250
7251                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7252                                 if (ifa->flags & (IFA_F_TENTATIVE |
7253                                                         IFA_F_DEPRECATED))
7254                                         continue;
7255                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7256                                 break;
7257                         }
7258                         sockaddr_storage->addr6.ScopeId = 0;
7259                 }
7260
7261                 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7262         }
7263         rtnl_unlock();
7264
7265         /* zero if this is last one */
7266         if (nii_rsp)
7267                 nii_rsp->Next = 0;
7268
7269         if (!nbytes) {
7270                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7271                 return -EINVAL;
7272         }
7273
7274         rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7275         rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7276         return nbytes;
7277 }
7278
7279 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7280                                          struct validate_negotiate_info_req *neg_req,
7281                                          struct validate_negotiate_info_rsp *neg_rsp)
7282 {
7283         int ret = 0;
7284         int dialect;
7285
7286         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7287                                              neg_req->DialectCount);
7288         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7289                 ret = -EINVAL;
7290                 goto err_out;
7291         }
7292
7293         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7294                 ret = -EINVAL;
7295                 goto err_out;
7296         }
7297
7298         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7299                 ret = -EINVAL;
7300                 goto err_out;
7301         }
7302
7303         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7304                 ret = -EINVAL;
7305                 goto err_out;
7306         }
7307
7308         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7309         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7310         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7311         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7312 err_out:
7313         return ret;
7314 }
7315
7316 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7317                                         struct file_allocated_range_buffer *qar_req,
7318                                         struct file_allocated_range_buffer *qar_rsp,
7319                                         int in_count, int *out_count)
7320 {
7321         struct ksmbd_file *fp;
7322         loff_t start, length;
7323         int ret = 0;
7324
7325         *out_count = 0;
7326         if (in_count == 0)
7327                 return -EINVAL;
7328
7329         fp = ksmbd_lookup_fd_fast(work, id);
7330         if (!fp)
7331                 return -ENOENT;
7332
7333         start = le64_to_cpu(qar_req->file_offset);
7334         length = le64_to_cpu(qar_req->length);
7335
7336         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7337                                    qar_rsp, in_count, out_count);
7338         if (ret && ret != -E2BIG)
7339                 *out_count = 0;
7340
7341         ksmbd_fd_put(work, fp);
7342         return ret;
7343 }
7344
7345 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7346                                  int out_buf_len, struct smb2_ioctl_req *req,
7347                                  struct smb2_ioctl_rsp *rsp)
7348 {
7349         struct ksmbd_rpc_command *rpc_resp;
7350         char *data_buf = (char *)&req->Buffer[0];
7351         int nbytes = 0;
7352
7353         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7354                                    le32_to_cpu(req->InputCount));
7355         if (rpc_resp) {
7356                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7357                         /*
7358                          * set STATUS_SOME_NOT_MAPPED response
7359                          * for unknown domain sid.
7360                          */
7361                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7362                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7363                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7364                         goto out;
7365                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7366                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7367                         goto out;
7368                 }
7369
7370                 nbytes = rpc_resp->payload_sz;
7371                 if (rpc_resp->payload_sz > out_buf_len) {
7372                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7373                         nbytes = out_buf_len;
7374                 }
7375
7376                 if (!rpc_resp->payload_sz) {
7377                         rsp->hdr.Status =
7378                                 STATUS_UNEXPECTED_IO_ERROR;
7379                         goto out;
7380                 }
7381
7382                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7383         }
7384 out:
7385         kvfree(rpc_resp);
7386         return nbytes;
7387 }
7388
7389 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7390                                    struct file_sparse *sparse)
7391 {
7392         struct ksmbd_file *fp;
7393         struct user_namespace *user_ns;
7394         int ret = 0;
7395         __le32 old_fattr;
7396
7397         fp = ksmbd_lookup_fd_fast(work, id);
7398         if (!fp)
7399                 return -ENOENT;
7400         user_ns = file_mnt_user_ns(fp->filp);
7401
7402         old_fattr = fp->f_ci->m_fattr;
7403         if (sparse->SetSparse)
7404                 fp->f_ci->m_fattr |= ATTR_SPARSE_FILE_LE;
7405         else
7406                 fp->f_ci->m_fattr &= ~ATTR_SPARSE_FILE_LE;
7407
7408         if (fp->f_ci->m_fattr != old_fattr &&
7409             test_share_config_flag(work->tcon->share_conf,
7410                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7411                 struct xattr_dos_attrib da;
7412
7413                 ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7414                                                      fp->filp->f_path.dentry, &da);
7415                 if (ret <= 0)
7416                         goto out;
7417
7418                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7419                 ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7420                                                      fp->filp->f_path.dentry, &da);
7421                 if (ret)
7422                         fp->f_ci->m_fattr = old_fattr;
7423         }
7424
7425 out:
7426         ksmbd_fd_put(work, fp);
7427         return ret;
7428 }
7429
7430 static int fsctl_request_resume_key(struct ksmbd_work *work,
7431                                     struct smb2_ioctl_req *req,
7432                                     struct resume_key_ioctl_rsp *key_rsp)
7433 {
7434         struct ksmbd_file *fp;
7435
7436         fp = ksmbd_lookup_fd_slow(work,
7437                                   le64_to_cpu(req->VolatileFileId),
7438                                   le64_to_cpu(req->PersistentFileId));
7439         if (!fp)
7440                 return -ENOENT;
7441
7442         memset(key_rsp, 0, sizeof(*key_rsp));
7443         key_rsp->ResumeKey[0] = req->VolatileFileId;
7444         key_rsp->ResumeKey[1] = req->PersistentFileId;
7445         ksmbd_fd_put(work, fp);
7446
7447         return 0;
7448 }
7449
7450 /**
7451  * smb2_ioctl() - handler for smb2 ioctl command
7452  * @work:       smb work containing ioctl command buffer
7453  *
7454  * Return:      0 on success, otherwise error
7455  */
7456 int smb2_ioctl(struct ksmbd_work *work)
7457 {
7458         struct smb2_ioctl_req *req;
7459         struct smb2_ioctl_rsp *rsp, *rsp_org;
7460         int cnt_code, nbytes = 0;
7461         int out_buf_len;
7462         u64 id = KSMBD_NO_FID;
7463         struct ksmbd_conn *conn = work->conn;
7464         int ret = 0;
7465
7466         rsp_org = work->response_buf;
7467         if (work->next_smb2_rcv_hdr_off) {
7468                 req = ksmbd_req_buf_next(work);
7469                 rsp = ksmbd_resp_buf_next(work);
7470                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
7471                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7472                                     work->compound_fid);
7473                         id = work->compound_fid;
7474                 }
7475         } else {
7476                 req = work->request_buf;
7477                 rsp = work->response_buf;
7478         }
7479
7480         if (!has_file_id(id))
7481                 id = le64_to_cpu(req->VolatileFileId);
7482
7483         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7484                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7485                 goto out;
7486         }
7487
7488         cnt_code = le32_to_cpu(req->CntCode);
7489         out_buf_len = le32_to_cpu(req->MaxOutputResponse);
7490         out_buf_len = min(KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7491
7492         switch (cnt_code) {
7493         case FSCTL_DFS_GET_REFERRALS:
7494         case FSCTL_DFS_GET_REFERRALS_EX:
7495                 /* Not support DFS yet */
7496                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7497                 goto out;
7498         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7499         {
7500                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7501
7502                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7503                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7504                         &rsp->Buffer[0];
7505
7506                 /*
7507                  * TODO: This is dummy implementation to pass smbtorture
7508                  * Need to check correct response later
7509                  */
7510                 memset(obj_buf->ObjectId, 0x0, 16);
7511                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7512                 memset(obj_buf->BirthObjectId, 0x0, 16);
7513                 memset(obj_buf->DomainId, 0x0, 16);
7514
7515                 break;
7516         }
7517         case FSCTL_PIPE_TRANSCEIVE:
7518                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7519                 break;
7520         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7521                 if (conn->dialect < SMB30_PROT_ID) {
7522                         ret = -EOPNOTSUPP;
7523                         goto out;
7524                 }
7525
7526                 ret = fsctl_validate_negotiate_info(conn,
7527                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7528                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0]);
7529                 if (ret < 0)
7530                         goto out;
7531
7532                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7533                 rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7534                 rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7535                 break;
7536         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7537                 nbytes = fsctl_query_iface_info_ioctl(conn, req, rsp);
7538                 if (nbytes < 0)
7539                         goto out;
7540                 break;
7541         case FSCTL_REQUEST_RESUME_KEY:
7542                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7543                         ret = -EINVAL;
7544                         goto out;
7545                 }
7546
7547                 ret = fsctl_request_resume_key(work, req,
7548                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7549                 if (ret < 0)
7550                         goto out;
7551                 rsp->PersistentFileId = req->PersistentFileId;
7552                 rsp->VolatileFileId = req->VolatileFileId;
7553                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7554                 break;
7555         case FSCTL_COPYCHUNK:
7556         case FSCTL_COPYCHUNK_WRITE:
7557                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7558                         ksmbd_debug(SMB,
7559                                     "User does not have write permission\n");
7560                         ret = -EACCES;
7561                         goto out;
7562                 }
7563
7564                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7565                         ret = -EINVAL;
7566                         goto out;
7567                 }
7568
7569                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7570                 fsctl_copychunk(work, req, rsp);
7571                 break;
7572         case FSCTL_SET_SPARSE:
7573                 ret = fsctl_set_sparse(work, id,
7574                                        (struct file_sparse *)&req->Buffer[0]);
7575                 if (ret < 0)
7576                         goto out;
7577                 break;
7578         case FSCTL_SET_ZERO_DATA:
7579         {
7580                 struct file_zero_data_information *zero_data;
7581                 struct ksmbd_file *fp;
7582                 loff_t off, len;
7583
7584                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7585                         ksmbd_debug(SMB,
7586                                     "User does not have write permission\n");
7587                         ret = -EACCES;
7588                         goto out;
7589                 }
7590
7591                 zero_data =
7592                         (struct file_zero_data_information *)&req->Buffer[0];
7593
7594                 fp = ksmbd_lookup_fd_fast(work, id);
7595                 if (!fp) {
7596                         ret = -ENOENT;
7597                         goto out;
7598                 }
7599
7600                 off = le64_to_cpu(zero_data->FileOffset);
7601                 len = le64_to_cpu(zero_data->BeyondFinalZero) - off;
7602
7603                 ret = ksmbd_vfs_zero_data(work, fp, off, len);
7604                 ksmbd_fd_put(work, fp);
7605                 if (ret < 0)
7606                         goto out;
7607                 break;
7608         }
7609         case FSCTL_QUERY_ALLOCATED_RANGES:
7610                 ret = fsctl_query_allocated_ranges(work, id,
7611                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7612                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7613                         out_buf_len /
7614                         sizeof(struct file_allocated_range_buffer), &nbytes);
7615                 if (ret == -E2BIG) {
7616                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7617                 } else if (ret < 0) {
7618                         nbytes = 0;
7619                         goto out;
7620                 }
7621
7622                 nbytes *= sizeof(struct file_allocated_range_buffer);
7623                 break;
7624         case FSCTL_GET_REPARSE_POINT:
7625         {
7626                 struct reparse_data_buffer *reparse_ptr;
7627                 struct ksmbd_file *fp;
7628
7629                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7630                 fp = ksmbd_lookup_fd_fast(work, id);
7631                 if (!fp) {
7632                         pr_err("not found fp!!\n");
7633                         ret = -ENOENT;
7634                         goto out;
7635                 }
7636
7637                 reparse_ptr->ReparseTag =
7638                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7639                 reparse_ptr->ReparseDataLength = 0;
7640                 ksmbd_fd_put(work, fp);
7641                 nbytes = sizeof(struct reparse_data_buffer);
7642                 break;
7643         }
7644         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7645         {
7646                 struct ksmbd_file *fp_in, *fp_out = NULL;
7647                 struct duplicate_extents_to_file *dup_ext;
7648                 loff_t src_off, dst_off, length, cloned;
7649
7650                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7651
7652                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7653                                              dup_ext->PersistentFileHandle);
7654                 if (!fp_in) {
7655                         pr_err("not found file handle in duplicate extent to file\n");
7656                         ret = -ENOENT;
7657                         goto out;
7658                 }
7659
7660                 fp_out = ksmbd_lookup_fd_fast(work, id);
7661                 if (!fp_out) {
7662                         pr_err("not found fp\n");
7663                         ret = -ENOENT;
7664                         goto dup_ext_out;
7665                 }
7666
7667                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7668                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7669                 length = le64_to_cpu(dup_ext->ByteCount);
7670                 cloned = vfs_clone_file_range(fp_in->filp, src_off, fp_out->filp,
7671                                               dst_off, length, 0);
7672                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7673                         ret = -EOPNOTSUPP;
7674                         goto dup_ext_out;
7675                 } else if (cloned != length) {
7676                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7677                                                      fp_out->filp, dst_off, length, 0);
7678                         if (cloned != length) {
7679                                 if (cloned < 0)
7680                                         ret = cloned;
7681                                 else
7682                                         ret = -EINVAL;
7683                         }
7684                 }
7685
7686 dup_ext_out:
7687                 ksmbd_fd_put(work, fp_in);
7688                 ksmbd_fd_put(work, fp_out);
7689                 if (ret < 0)
7690                         goto out;
7691                 break;
7692         }
7693         default:
7694                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7695                             cnt_code);
7696                 ret = -EOPNOTSUPP;
7697                 goto out;
7698         }
7699
7700         rsp->CntCode = cpu_to_le32(cnt_code);
7701         rsp->InputCount = cpu_to_le32(0);
7702         rsp->InputOffset = cpu_to_le32(112);
7703         rsp->OutputOffset = cpu_to_le32(112);
7704         rsp->OutputCount = cpu_to_le32(nbytes);
7705         rsp->StructureSize = cpu_to_le16(49);
7706         rsp->Reserved = cpu_to_le16(0);
7707         rsp->Flags = cpu_to_le32(0);
7708         rsp->Reserved2 = cpu_to_le32(0);
7709         inc_rfc1001_len(rsp_org, 48 + nbytes);
7710
7711         return 0;
7712
7713 out:
7714         if (ret == -EACCES)
7715                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7716         else if (ret == -ENOENT)
7717                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7718         else if (ret == -EOPNOTSUPP)
7719                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7720         else if (ret < 0 || rsp->hdr.Status == 0)
7721                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7722         smb2_set_err_rsp(work);
7723         return 0;
7724 }
7725
7726 /**
7727  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7728  * @work:       smb work containing oplock break command buffer
7729  *
7730  * Return:      0
7731  */
7732 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7733 {
7734         struct smb2_oplock_break *req = work->request_buf;
7735         struct smb2_oplock_break *rsp = work->response_buf;
7736         struct ksmbd_file *fp;
7737         struct oplock_info *opinfo = NULL;
7738         __le32 err = 0;
7739         int ret = 0;
7740         u64 volatile_id, persistent_id;
7741         char req_oplevel = 0, rsp_oplevel = 0;
7742         unsigned int oplock_change_type;
7743
7744         volatile_id = le64_to_cpu(req->VolatileFid);
7745         persistent_id = le64_to_cpu(req->PersistentFid);
7746         req_oplevel = req->OplockLevel;
7747         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7748                     volatile_id, persistent_id, req_oplevel);
7749
7750         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7751         if (!fp) {
7752                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7753                 smb2_set_err_rsp(work);
7754                 return;
7755         }
7756
7757         opinfo = opinfo_get(fp);
7758         if (!opinfo) {
7759                 pr_err("unexpected null oplock_info\n");
7760                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7761                 smb2_set_err_rsp(work);
7762                 ksmbd_fd_put(work, fp);
7763                 return;
7764         }
7765
7766         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7767                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7768                 goto err_out;
7769         }
7770
7771         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7772                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7773                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7774                 goto err_out;
7775         }
7776
7777         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7778              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7779             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7780              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7781                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7782                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7783         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7784                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7785                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7786                 oplock_change_type = OPLOCK_READ_TO_NONE;
7787         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7788                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7789                 err = STATUS_INVALID_DEVICE_STATE;
7790                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7791                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7792                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7793                         oplock_change_type = OPLOCK_WRITE_TO_READ;
7794                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7795                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7796                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7797                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
7798                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7799                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7800                         oplock_change_type = OPLOCK_READ_TO_NONE;
7801                 } else {
7802                         oplock_change_type = 0;
7803                 }
7804         } else {
7805                 oplock_change_type = 0;
7806         }
7807
7808         switch (oplock_change_type) {
7809         case OPLOCK_WRITE_TO_READ:
7810                 ret = opinfo_write_to_read(opinfo);
7811                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
7812                 break;
7813         case OPLOCK_WRITE_TO_NONE:
7814                 ret = opinfo_write_to_none(opinfo);
7815                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7816                 break;
7817         case OPLOCK_READ_TO_NONE:
7818                 ret = opinfo_read_to_none(opinfo);
7819                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7820                 break;
7821         default:
7822                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
7823                        opinfo->level, rsp_oplevel);
7824         }
7825
7826         if (ret < 0) {
7827                 rsp->hdr.Status = err;
7828                 goto err_out;
7829         }
7830
7831         opinfo_put(opinfo);
7832         ksmbd_fd_put(work, fp);
7833         opinfo->op_state = OPLOCK_STATE_NONE;
7834         wake_up_interruptible_all(&opinfo->oplock_q);
7835
7836         rsp->StructureSize = cpu_to_le16(24);
7837         rsp->OplockLevel = rsp_oplevel;
7838         rsp->Reserved = 0;
7839         rsp->Reserved2 = 0;
7840         rsp->VolatileFid = cpu_to_le64(volatile_id);
7841         rsp->PersistentFid = cpu_to_le64(persistent_id);
7842         inc_rfc1001_len(rsp, 24);
7843         return;
7844
7845 err_out:
7846         opinfo->op_state = OPLOCK_STATE_NONE;
7847         wake_up_interruptible_all(&opinfo->oplock_q);
7848
7849         opinfo_put(opinfo);
7850         ksmbd_fd_put(work, fp);
7851         smb2_set_err_rsp(work);
7852 }
7853
7854 static int check_lease_state(struct lease *lease, __le32 req_state)
7855 {
7856         if ((lease->new_state ==
7857              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
7858             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
7859                 lease->new_state = req_state;
7860                 return 0;
7861         }
7862
7863         if (lease->new_state == req_state)
7864                 return 0;
7865
7866         return 1;
7867 }
7868
7869 /**
7870  * smb21_lease_break_ack() - handler for smb2.1 lease break command
7871  * @work:       smb work containing lease break command buffer
7872  *
7873  * Return:      0
7874  */
7875 static void smb21_lease_break_ack(struct ksmbd_work *work)
7876 {
7877         struct ksmbd_conn *conn = work->conn;
7878         struct smb2_lease_ack *req = work->request_buf;
7879         struct smb2_lease_ack *rsp = work->response_buf;
7880         struct oplock_info *opinfo;
7881         __le32 err = 0;
7882         int ret = 0;
7883         unsigned int lease_change_type;
7884         __le32 lease_state;
7885         struct lease *lease;
7886
7887         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
7888                     le32_to_cpu(req->LeaseState));
7889         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
7890         if (!opinfo) {
7891                 ksmbd_debug(OPLOCK, "file not opened\n");
7892                 smb2_set_err_rsp(work);
7893                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7894                 return;
7895         }
7896         lease = opinfo->o_lease;
7897
7898         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7899                 pr_err("unexpected lease break state 0x%x\n",
7900                        opinfo->op_state);
7901                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7902                 goto err_out;
7903         }
7904
7905         if (check_lease_state(lease, req->LeaseState)) {
7906                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
7907                 ksmbd_debug(OPLOCK,
7908                             "req lease state: 0x%x, expected state: 0x%x\n",
7909                             req->LeaseState, lease->new_state);
7910                 goto err_out;
7911         }
7912
7913         if (!atomic_read(&opinfo->breaking_cnt)) {
7914                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7915                 goto err_out;
7916         }
7917
7918         /* check for bad lease state */
7919         if (req->LeaseState &
7920             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
7921                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7922                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
7923                         lease_change_type = OPLOCK_WRITE_TO_NONE;
7924                 else
7925                         lease_change_type = OPLOCK_READ_TO_NONE;
7926                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
7927                             le32_to_cpu(lease->state),
7928                             le32_to_cpu(req->LeaseState));
7929         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
7930                    req->LeaseState != SMB2_LEASE_NONE_LE) {
7931                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7932                 lease_change_type = OPLOCK_READ_TO_NONE;
7933                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
7934                             le32_to_cpu(lease->state),
7935                             le32_to_cpu(req->LeaseState));
7936         } else {
7937                 /* valid lease state changes */
7938                 err = STATUS_INVALID_DEVICE_STATE;
7939                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
7940                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
7941                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
7942                         else
7943                                 lease_change_type = OPLOCK_READ_TO_NONE;
7944                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
7945                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
7946                                 lease_change_type = OPLOCK_WRITE_TO_READ;
7947                         else
7948                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
7949                 } else {
7950                         lease_change_type = 0;
7951                 }
7952         }
7953
7954         switch (lease_change_type) {
7955         case OPLOCK_WRITE_TO_READ:
7956                 ret = opinfo_write_to_read(opinfo);
7957                 break;
7958         case OPLOCK_READ_HANDLE_TO_READ:
7959                 ret = opinfo_read_handle_to_read(opinfo);
7960                 break;
7961         case OPLOCK_WRITE_TO_NONE:
7962                 ret = opinfo_write_to_none(opinfo);
7963                 break;
7964         case OPLOCK_READ_TO_NONE:
7965                 ret = opinfo_read_to_none(opinfo);
7966                 break;
7967         default:
7968                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
7969                             le32_to_cpu(lease->state),
7970                             le32_to_cpu(req->LeaseState));
7971         }
7972
7973         lease_state = lease->state;
7974         opinfo->op_state = OPLOCK_STATE_NONE;
7975         wake_up_interruptible_all(&opinfo->oplock_q);
7976         atomic_dec(&opinfo->breaking_cnt);
7977         wake_up_interruptible_all(&opinfo->oplock_brk);
7978         opinfo_put(opinfo);
7979
7980         if (ret < 0) {
7981                 rsp->hdr.Status = err;
7982                 goto err_out;
7983         }
7984
7985         rsp->StructureSize = cpu_to_le16(36);
7986         rsp->Reserved = 0;
7987         rsp->Flags = 0;
7988         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
7989         rsp->LeaseState = lease_state;
7990         rsp->LeaseDuration = 0;
7991         inc_rfc1001_len(rsp, 36);
7992         return;
7993
7994 err_out:
7995         opinfo->op_state = OPLOCK_STATE_NONE;
7996         wake_up_interruptible_all(&opinfo->oplock_q);
7997         atomic_dec(&opinfo->breaking_cnt);
7998         wake_up_interruptible_all(&opinfo->oplock_brk);
7999
8000         opinfo_put(opinfo);
8001         smb2_set_err_rsp(work);
8002 }
8003
8004 /**
8005  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8006  * @work:       smb work containing oplock/lease break command buffer
8007  *
8008  * Return:      0
8009  */
8010 int smb2_oplock_break(struct ksmbd_work *work)
8011 {
8012         struct smb2_oplock_break *req = work->request_buf;
8013         struct smb2_oplock_break *rsp = work->response_buf;
8014
8015         switch (le16_to_cpu(req->StructureSize)) {
8016         case OP_BREAK_STRUCT_SIZE_20:
8017                 smb20_oplock_break_ack(work);
8018                 break;
8019         case OP_BREAK_STRUCT_SIZE_21:
8020                 smb21_lease_break_ack(work);
8021                 break;
8022         default:
8023                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8024                             le16_to_cpu(req->StructureSize));
8025                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8026                 smb2_set_err_rsp(work);
8027         }
8028
8029         return 0;
8030 }
8031
8032 /**
8033  * smb2_notify() - handler for smb2 notify request
8034  * @work:   smb work containing notify command buffer
8035  *
8036  * Return:      0
8037  */
8038 int smb2_notify(struct ksmbd_work *work)
8039 {
8040         struct smb2_notify_req *req;
8041         struct smb2_notify_rsp *rsp;
8042
8043         WORK_BUFFERS(work, req, rsp);
8044
8045         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8046                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8047                 smb2_set_err_rsp(work);
8048                 return 0;
8049         }
8050
8051         smb2_set_err_rsp(work);
8052         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8053         return 0;
8054 }
8055
8056 /**
8057  * smb2_is_sign_req() - handler for checking packet signing status
8058  * @work:       smb work containing notify command buffer
8059  * @command:    SMB2 command id
8060  *
8061  * Return:      true if packed is signed, false otherwise
8062  */
8063 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8064 {
8065         struct smb2_hdr *rcv_hdr2 = work->request_buf;
8066
8067         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8068             command != SMB2_NEGOTIATE_HE &&
8069             command != SMB2_SESSION_SETUP_HE &&
8070             command != SMB2_OPLOCK_BREAK_HE)
8071                 return true;
8072
8073         return false;
8074 }
8075
8076 /**
8077  * smb2_check_sign_req() - handler for req packet sign processing
8078  * @work:   smb work containing notify command buffer
8079  *
8080  * Return:      1 on success, 0 otherwise
8081  */
8082 int smb2_check_sign_req(struct ksmbd_work *work)
8083 {
8084         struct smb2_hdr *hdr, *hdr_org;
8085         char signature_req[SMB2_SIGNATURE_SIZE];
8086         char signature[SMB2_HMACSHA256_SIZE];
8087         struct kvec iov[1];
8088         size_t len;
8089
8090         hdr_org = hdr = work->request_buf;
8091         if (work->next_smb2_rcv_hdr_off)
8092                 hdr = ksmbd_req_buf_next(work);
8093
8094         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8095                 len = be32_to_cpu(hdr_org->smb2_buf_length);
8096         else if (hdr->NextCommand)
8097                 len = le32_to_cpu(hdr->NextCommand);
8098         else
8099                 len = be32_to_cpu(hdr_org->smb2_buf_length) -
8100                         work->next_smb2_rcv_hdr_off;
8101
8102         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8103         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8104
8105         iov[0].iov_base = (char *)&hdr->ProtocolId;
8106         iov[0].iov_len = len;
8107
8108         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8109                                 signature))
8110                 return 0;
8111
8112         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8113                 pr_err("bad smb2 signature\n");
8114                 return 0;
8115         }
8116
8117         return 1;
8118 }
8119
8120 /**
8121  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8122  * @work:   smb work containing notify command buffer
8123  *
8124  */
8125 void smb2_set_sign_rsp(struct ksmbd_work *work)
8126 {
8127         struct smb2_hdr *hdr, *hdr_org;
8128         struct smb2_hdr *req_hdr;
8129         char signature[SMB2_HMACSHA256_SIZE];
8130         struct kvec iov[2];
8131         size_t len;
8132         int n_vec = 1;
8133
8134         hdr_org = hdr = work->response_buf;
8135         if (work->next_smb2_rsp_hdr_off)
8136                 hdr = ksmbd_resp_buf_next(work);
8137
8138         req_hdr = ksmbd_req_buf_next(work);
8139
8140         if (!work->next_smb2_rsp_hdr_off) {
8141                 len = get_rfc1002_len(hdr_org);
8142                 if (req_hdr->NextCommand)
8143                         len = ALIGN(len, 8);
8144         } else {
8145                 len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
8146                 len = ALIGN(len, 8);
8147         }
8148
8149         if (req_hdr->NextCommand)
8150                 hdr->NextCommand = cpu_to_le32(len);
8151
8152         hdr->Flags |= SMB2_FLAGS_SIGNED;
8153         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8154
8155         iov[0].iov_base = (char *)&hdr->ProtocolId;
8156         iov[0].iov_len = len;
8157
8158         if (work->aux_payload_sz) {
8159                 iov[0].iov_len -= work->aux_payload_sz;
8160
8161                 iov[1].iov_base = work->aux_payload_buf;
8162                 iov[1].iov_len = work->aux_payload_sz;
8163                 n_vec++;
8164         }
8165
8166         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8167                                  signature))
8168                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8169 }
8170
8171 /**
8172  * smb3_check_sign_req() - handler for req packet sign processing
8173  * @work:   smb work containing notify command buffer
8174  *
8175  * Return:      1 on success, 0 otherwise
8176  */
8177 int smb3_check_sign_req(struct ksmbd_work *work)
8178 {
8179         struct ksmbd_conn *conn = work->conn;
8180         char *signing_key;
8181         struct smb2_hdr *hdr, *hdr_org;
8182         struct channel *chann;
8183         char signature_req[SMB2_SIGNATURE_SIZE];
8184         char signature[SMB2_CMACAES_SIZE];
8185         struct kvec iov[1];
8186         size_t len;
8187
8188         hdr_org = hdr = work->request_buf;
8189         if (work->next_smb2_rcv_hdr_off)
8190                 hdr = ksmbd_req_buf_next(work);
8191
8192         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8193                 len = be32_to_cpu(hdr_org->smb2_buf_length);
8194         else if (hdr->NextCommand)
8195                 len = le32_to_cpu(hdr->NextCommand);
8196         else
8197                 len = be32_to_cpu(hdr_org->smb2_buf_length) -
8198                         work->next_smb2_rcv_hdr_off;
8199
8200         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8201                 signing_key = work->sess->smb3signingkey;
8202         } else {
8203                 chann = lookup_chann_list(work->sess, conn);
8204                 if (!chann)
8205                         return 0;
8206                 signing_key = chann->smb3signingkey;
8207         }
8208
8209         if (!signing_key) {
8210                 pr_err("SMB3 signing key is not generated\n");
8211                 return 0;
8212         }
8213
8214         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8215         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8216         iov[0].iov_base = (char *)&hdr->ProtocolId;
8217         iov[0].iov_len = len;
8218
8219         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8220                 return 0;
8221
8222         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8223                 pr_err("bad smb2 signature\n");
8224                 return 0;
8225         }
8226
8227         return 1;
8228 }
8229
8230 /**
8231  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8232  * @work:   smb work containing notify command buffer
8233  *
8234  */
8235 void smb3_set_sign_rsp(struct ksmbd_work *work)
8236 {
8237         struct ksmbd_conn *conn = work->conn;
8238         struct smb2_hdr *req_hdr;
8239         struct smb2_hdr *hdr, *hdr_org;
8240         struct channel *chann;
8241         char signature[SMB2_CMACAES_SIZE];
8242         struct kvec iov[2];
8243         int n_vec = 1;
8244         size_t len;
8245         char *signing_key;
8246
8247         hdr_org = hdr = work->response_buf;
8248         if (work->next_smb2_rsp_hdr_off)
8249                 hdr = ksmbd_resp_buf_next(work);
8250
8251         req_hdr = ksmbd_req_buf_next(work);
8252
8253         if (!work->next_smb2_rsp_hdr_off) {
8254                 len = get_rfc1002_len(hdr_org);
8255                 if (req_hdr->NextCommand)
8256                         len = ALIGN(len, 8);
8257         } else {
8258                 len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
8259                 len = ALIGN(len, 8);
8260         }
8261
8262         if (conn->binding == false &&
8263             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8264                 signing_key = work->sess->smb3signingkey;
8265         } else {
8266                 chann = lookup_chann_list(work->sess, work->conn);
8267                 if (!chann)
8268                         return;
8269                 signing_key = chann->smb3signingkey;
8270         }
8271
8272         if (!signing_key)
8273                 return;
8274
8275         if (req_hdr->NextCommand)
8276                 hdr->NextCommand = cpu_to_le32(len);
8277
8278         hdr->Flags |= SMB2_FLAGS_SIGNED;
8279         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8280         iov[0].iov_base = (char *)&hdr->ProtocolId;
8281         iov[0].iov_len = len;
8282         if (work->aux_payload_sz) {
8283                 iov[0].iov_len -= work->aux_payload_sz;
8284                 iov[1].iov_base = work->aux_payload_buf;
8285                 iov[1].iov_len = work->aux_payload_sz;
8286                 n_vec++;
8287         }
8288
8289         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8290                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8291 }
8292
8293 /**
8294  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8295  * @work:   smb work containing response buffer
8296  *
8297  */
8298 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8299 {
8300         struct ksmbd_conn *conn = work->conn;
8301         struct ksmbd_session *sess = work->sess;
8302         struct smb2_hdr *req, *rsp;
8303
8304         if (conn->dialect != SMB311_PROT_ID)
8305                 return;
8306
8307         WORK_BUFFERS(work, req, rsp);
8308
8309         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8310             conn->preauth_info)
8311                 ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
8312                                                  conn->preauth_info->Preauth_HashValue);
8313
8314         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8315                 __u8 *hash_value;
8316
8317                 if (conn->binding) {
8318                         struct preauth_session *preauth_sess;
8319
8320                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8321                         if (!preauth_sess)
8322                                 return;
8323                         hash_value = preauth_sess->Preauth_HashValue;
8324                 } else {
8325                         hash_value = sess->Preauth_HashValue;
8326                         if (!hash_value)
8327                                 return;
8328                 }
8329                 ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
8330                                                  hash_value);
8331         }
8332 }
8333
8334 static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, char *old_buf,
8335                                __le16 cipher_type)
8336 {
8337         struct smb2_hdr *hdr = (struct smb2_hdr *)old_buf;
8338         unsigned int orig_len = get_rfc1002_len(old_buf);
8339
8340         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
8341         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8342         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8343         tr_hdr->Flags = cpu_to_le16(0x01);
8344         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8345             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8346                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8347         else
8348                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8349         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8350         inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
8351         inc_rfc1001_len(tr_hdr, orig_len);
8352 }
8353
8354 int smb3_encrypt_resp(struct ksmbd_work *work)
8355 {
8356         char *buf = work->response_buf;
8357         struct smb2_transform_hdr *tr_hdr;
8358         struct kvec iov[3];
8359         int rc = -ENOMEM;
8360         int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8361
8362         if (ARRAY_SIZE(iov) < rq_nvec)
8363                 return -ENOMEM;
8364
8365         tr_hdr = kzalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
8366         if (!tr_hdr)
8367                 return rc;
8368
8369         /* fill transform header */
8370         fill_transform_hdr(tr_hdr, buf, work->conn->cipher_type);
8371
8372         iov[0].iov_base = tr_hdr;
8373         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
8374         buf_size += iov[0].iov_len - 4;
8375
8376         iov[1].iov_base = buf + 4;
8377         iov[1].iov_len = get_rfc1002_len(buf);
8378         if (work->aux_payload_sz) {
8379                 iov[1].iov_len = work->resp_hdr_sz - 4;
8380
8381                 iov[2].iov_base = work->aux_payload_buf;
8382                 iov[2].iov_len = work->aux_payload_sz;
8383                 buf_size += iov[2].iov_len;
8384         }
8385         buf_size += iov[1].iov_len;
8386         work->resp_hdr_sz = iov[1].iov_len;
8387
8388         rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1);
8389         if (rc)
8390                 return rc;
8391
8392         memmove(buf, iov[1].iov_base, iov[1].iov_len);
8393         tr_hdr->smb2_buf_length = cpu_to_be32(buf_size);
8394         work->tr_buf = tr_hdr;
8395
8396         return rc;
8397 }
8398
8399 bool smb3_is_transform_hdr(void *buf)
8400 {
8401         struct smb2_transform_hdr *trhdr = buf;
8402
8403         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8404 }
8405
8406 int smb3_decrypt_req(struct ksmbd_work *work)
8407 {
8408         struct ksmbd_conn *conn = work->conn;
8409         struct ksmbd_session *sess;
8410         char *buf = work->request_buf;
8411         struct smb2_hdr *hdr;
8412         unsigned int pdu_length = get_rfc1002_len(buf);
8413         struct kvec iov[2];
8414         unsigned int buf_data_size = pdu_length + 4 -
8415                 sizeof(struct smb2_transform_hdr);
8416         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
8417         int rc = 0;
8418
8419         if (pdu_length + 4 <
8420             sizeof(struct smb2_transform_hdr) + sizeof(struct smb2_hdr)) {
8421                 pr_err("Transform message is too small (%u)\n",
8422                        pdu_length);
8423                 return -ECONNABORTED;
8424         }
8425
8426         if (pdu_length + 4 <
8427             le32_to_cpu(tr_hdr->OriginalMessageSize) + sizeof(struct smb2_transform_hdr)) {
8428                 pr_err("Transform message is broken\n");
8429                 return -ECONNABORTED;
8430         }
8431
8432         sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId));
8433         if (!sess) {
8434                 pr_err("invalid session id(%llx) in transform header\n",
8435                        le64_to_cpu(tr_hdr->SessionId));
8436                 return -ECONNABORTED;
8437         }
8438
8439         iov[0].iov_base = buf;
8440         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
8441         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
8442         iov[1].iov_len = buf_data_size;
8443         rc = ksmbd_crypt_message(conn, iov, 2, 0);
8444         if (rc)
8445                 return rc;
8446
8447         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8448         hdr = (struct smb2_hdr *)buf;
8449         hdr->smb2_buf_length = cpu_to_be32(buf_data_size);
8450
8451         return rc;
8452 }
8453
8454 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8455 {
8456         struct ksmbd_conn *conn = work->conn;
8457         struct smb2_hdr *rsp = work->response_buf;
8458
8459         if (conn->dialect < SMB30_PROT_ID)
8460                 return false;
8461
8462         if (work->next_smb2_rcv_hdr_off)
8463                 rsp = ksmbd_resp_buf_next(work);
8464
8465         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8466             rsp->Status == STATUS_SUCCESS)
8467                 return true;
8468         return false;
8469 }